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  <P STYLE="MARGIN-BOTTOM: -2PX" align=center><B><FONT face=serif size=2>As filed with the Securities and
  Exchange Commission on September 18, 2009</FONT></B></P>
  
  <P STYLE="MARGIN-BOTTOM: -2PX; MARGIN-TOP: -5PX" align=right><B><FONT face=serif size=2>Registration No. 333- </FONT></B></P>
  
  <HR STYLE="MARGIN-TOP: -2PX" SIZE="4" COLOR="Black">
  <HR STYLE="MARGIN-TOP: -10PX" SIZE="1" COLOR="Black">
  <P STYLE="MARGIN-TOP: -5PX" align=center><B><FONT face=serif size=4>UNITED STATES<BR></FONT></B><B><FONT face=serif size=4>SECURITIES AND EXCHANGE COMMISSION<BR></FONT></B><B><FONT face=serif size=2>WASHINGTON, DC 20549<BR></FONT></B><B><FONT face=serif size=2>______________________________</FONT></B></P>
  <P align=center><FONT face=serif size=4><STRONG>FORM
  S-8<BR></STRONG></FONT><FONT face=serif size=4><STRONG>REGISTRATION
  STATEMENT<BR></STRONG></FONT><I><FONT face=serif size=2><STRONG>UNDER<BR></STRONG></FONT><FONT face=serif size=2><STRONG>THE
  SECURITIES ACT OF 1933<BR></STRONG></FONT></I><FONT face=serif size=2><STRONG>_______________________________________</STRONG> </FONT></P>
  <P align=center><B><FONT face=serif size=4>MECHANICAL TECHNOLOGY,
  INCORPORATED<BR></FONT></B><FONT face=serif size=2>(Exact name of registrant as
  specified in its
  charter)<BR><STRONG>_______________________________________</STRONG></FONT></P>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><B><FONT face=serif size=2>New
        York</FONT></B>&nbsp; </TD>
      <TD noWrap align=center width="50%"><B><FONT face=serif size=2>14-1462255</FONT></B>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT face=serif size=2>(State or other jurisdiction of
        incorporation or</FONT>&nbsp; </TD>
      <TD noWrap align=center width="50%"><FONT face=serif size=2>(I.R.S. Employer Identification
        Number)</FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT face=serif size=2>organization)</FONT>&nbsp; </TD>
      <TD noWrap align=left width="50%">&nbsp;
  </TD></TR></TABLE><BR>
  <P align=center><B><FONT face=serif size=2>431 New Karner
  Road<BR></FONT></B><B><FONT face=serif size=2>Albany, New York
  12205<BR></FONT></B><FONT face=serif size=2>(Address of Principal Executive
  Offices, including zip code)
  <BR><STRONG>_______________________________________</STRONG><BR></FONT></P>
  <P align=center><B><FONT face=serif size=2>Mechanical Technology, Incorporated
  Amended and Restated 2006 Equity Incentive Plan<BR></FONT></B><FONT face=serif size=2>(Full title of the plan)</FONT></P>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%">&nbsp; </TD>
      <TD noWrap align=center width="50%"><I><FONT face=serif size=2>Copies of
        Correspondence to:</FONT></I>&nbsp; </TD></TR>
    <TR>
      <TD align=center width="99%" colSpan=2>&nbsp;&nbsp;&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><B><FONT face=serif size=2>Peng K.
        Lim</FONT></B>&nbsp; </TD>
      <TD noWrap align=center width="50%"><B><FONT face=serif size=2>Brett E. Cooper,
        Esq.</FONT></B>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT face=serif size=2>President and Chief Executive
        Officer</FONT>&nbsp; </TD>
      <TD noWrap align=center width="50%"><FONT face=serif size=2>Orrick, Herrington &amp; Sutcliffe
        LLP</FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT face=serif size=2>431 New Karner Road</FONT>&nbsp; </TD>
      <TD noWrap align=center width="50%"><FONT face=serif size=2>The Orrick Building</FONT>&nbsp;
    </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT face=serif size=2>Albany, New York 12205</FONT>&nbsp;
      </TD>
      <TD noWrap align=center width="50%"><FONT face=serif size=2>405 Howard Street</FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT size=2>(518) <FONT face=serif>533-2200</FONT></FONT>&nbsp; </TD>
      <TD noWrap align=center width="50%"><FONT face=serif size=2>San Francisco, CA
        94105-2669</FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT face=serif size=2>(Name, address, and telephone number,
        including area</FONT>&nbsp; </TD>
      <TD noWrap align=center width="50%"><FONT size=2>(415) <FONT face=serif>773-5918</FONT></FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=center width="49%"><FONT face=serif size=2>code, of agent for
        service)</FONT>&nbsp; </TD>
      <TD noWrap align=left width="50%">&nbsp; </TD></TR>
    <TR>
      <TD noWrap align=center width="99%" colSpan=2><STRONG><FONT size=2>_______________________________________</FONT></STRONG>
    </TD></TR></TABLE>
  <P align=justify><FONT face=serif size=2>Indicate by check mark whether the
  Registrant is a large accelerated filer, an accelerated filer, a non-accelerated
  filer, or a smaller reporting company. See the definitions of &#147;large accelerated
  filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule 12b-2 of the
  Exchange Act. (Check one): </FONT></P>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR vAlign=bottom>
      <TD noWrap align=left width="60%"><FONT face=serif size=2>Large accelerated filer
        <FONT face=Wingdings>o</FONT></FONT>&nbsp; </TD>
      <TD noWrap align=left width="40%"><FONT face=serif size=2>Accelerated filer
        </FONT><FONT face=Wingdings size=2>o</FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="60%"><FONT face=serif size=2>Non-accelerated filer
        <FONT face=Wingdings>o </FONT><FONT face="Times New Roman">(Do not check
        if a smaller reporting company)</FONT></FONT>&nbsp; </TD>
      <TD noWrap align=left width="40%"><FONT face=serif size=2>Smaller reporting company
        <FONT face=Wingdings>x</FONT></FONT><FONT face=sans-serif size=2></FONT>&nbsp; </TD></TR></TABLE><BR>
  <P align=center><B><FONT face=serif size=2>CALCULATION OF REGISTRATION FEE
  </FONT></B></P>
  <TABLE style="LINE-HEIGHT: 14pt; BORDER-COLLAPSE: collapse" cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR vAlign=bottom>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="18%">&nbsp; </TD>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="19%">&nbsp; </TD>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="20%"><FONT face=serif size=2>Proposed</FONT></TD>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%">&nbsp; </TD>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="19%"><FONT face=serif size=2>Proposed</FONT></TD>
      <TD style="BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-TOP: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="20%">&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="18%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="19%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="20%"><FONT face=serif size=2>maximum</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="19%"><FONT face=serif size=2>maximum</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="20%">&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="18%"><FONT face=serif size=2>Title of securities</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="19%"><FONT face=serif size=2>Amount to be</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="20%"><FONT face=serif size=2>offering price per</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="19%"><FONT face=serif size=2>aggregate</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=center width="1%"></TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=center width="20%"><FONT face=serif size=2>Amount of</FONT></TD></TR>
    <TR vAlign=bottom>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="18%"><FONT face=serif size=2>to be registered</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="19%"><FONT face=serif size=2>registered<SUP>(1)</SUP></FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="20%"><FONT face=serif size=2>share</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="19%"><FONT face=serif size=2>offering price</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=center width="20%"><FONT face=serif size=2>registration fee</FONT></TD></TR>
    <TR vAlign=bottom>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="18%"><FONT face=serif size=2>Common stock,</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%">&nbsp;</TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="19%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="20%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="19%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="20%">&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="18%"><FONT face=serif size=2>$0.01 par value per</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="19%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=right width="20%">&nbsp;</TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="19%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="20%">&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="18%"><FONT face=serif size=2>share (Common</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="19%"><FONT face=serif size=2>350,000</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=right width="1%">&nbsp;</TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="20%"><FONT face=serif size=2>$1.105<SUP>(2)</SUP></FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="1%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=left width="19%"><FONT face=serif size=2>$386,750</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid" noWrap align=right width="1%">&nbsp;</TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid" noWrap align=left width="20%"><FONT face=serif size=2>$21.58</FONT></TD></TR>
    <TR vAlign=bottom>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="18%"><FONT face=serif size=2>Stock&#148;)</FONT></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="19%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="20%"></TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="1%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="19%">&nbsp; </TD>
      <TD style="BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="1%"></TD>
      <TD style="BORDER-RIGHT: #000000 1pt solid; BORDER-LEFT: #000000 1pt solid; BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="20%">&nbsp; </TD></TR></TABLE>
  <P align=justify><SUP><FONT face=serif size=2>(1) </FONT></SUP><FONT face=serif size=2>Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as
  amended (the &#147;</FONT><U><FONT face=serif size=2>Securities Act</FONT></U><FONT face=serif size=2>&#148;), this registration statement shall also cover any
  additional securities that become issuable by reason of any stock dividend,
  stock split, recapitalization or other similar transaction. </FONT></P>
  <P STYLE="MARGIN-BOTTOM: 10PX" align=justify><SUP><FONT face=serif size=2>(2) </FONT></SUP><FONT face=serif size=2>Pursuant to Rule 457(h) under the Securities Act, the registration fee
  for the additional 350,000 shares available to be offered or sold under the
  Mechanical Technology, Incorporated Amended and Restated 2006 Equity Incentive
  Plan is based upon a price of $1.105 per share, the average of the closing of
  the bid and asked prices of the Common Stock as reported on the Pink Sheets as
  of September 17, 2009.</FONT></p>
  
  <HR STYLE="MARGIN-TOP: -2PX" SIZE="4" COLOR="Black">
  <HR STYLE="MARGIN-TOP: -10PX" SIZE="1" COLOR="Black">
  
  <HR align=center width="100%" noShade SIZE=2>
  
  <PAGE>
  <P align=center><B><FONT face=serif size=2>PART I </FONT></B></P>
  <P align=center><B><FONT face=serif size=2>INFORMATION REQUIRED IN THE SECTION
  10(a) PROSPECTUS </FONT></B></P>
  <P align=justify><FONT face=serif size=2><FONT size=3>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</FONT>All Information required by Part I
  of Form S-8 to be contained in the prospectus is omitted from this registration
  statement in accordance with Rule 428 under the Securities Act.</FONT></P>
  <P align=center><B><FONT face=serif size=2>PART II </FONT></B></P>
  <P align=center><B><FONT face=serif size=2>INFORMATION REQUIRED IN THE
  REGISTRATION STATEMENT </FONT></B></P>
  <P align=center><B><U><FONT face=serif size=2>EXPLANATORY
  NOTE</FONT></U></B></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>On June
  5, 2006, the Registrant filed with the Securities and Exchange Commission (the
  &#147;</FONT><U><FONT face=serif size=2>Commission</FONT></U><FONT face=serif size=2>&#148;) a Registration Statement on Form S-8 (File No. 333-134730) (the
  &#147;</FONT><U><FONT face=serif size=2>2006 S-8</FONT></U><FONT face=serif size=2>&#148;)
  registering 250,000 shares (as adjusted to reflect a eight-for-one reverse stock
  split effected in May 2008 (the &#147;<U>Reverse Split</U>&#148;)) of the Registrant&#146;s common
  stock, $0.01 par value per share (the &#147;</FONT><U><FONT face=serif size=2>Common
  Stock</FONT></U><FONT face=serif size=2>&#148;), to be issued pursuant to the
  Registrant&#146;s Amended and Restated 2006 Equity Incentive Plan (&#147;</FONT><U><FONT face=serif size=2>2006 Plan</FONT></U><FONT face=serif size=2>&#148;). </FONT></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>This
  Registration Statement on Form S-8 registers an additional 350,000 shares of
  Common Stock that may be issued pursuant to the 2006 Plan. Pursuant to General
  Instruction E of Form S-8, this Registration Statement on Form S-8 hereby
  incorporates by reference the contents of the 2006 S-8. </FONT></P>
  <P align=justify><B><FONT face=serif size=2>ITEM 3. INCORPORATION OF DOCUMENTS
  BY REFERENCE. </FONT></B></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>The
  following documents, which have been filed by the Company with the Commission,
  are incorporated in this Registration Statement by reference: </FONT></P>
  <P style="PADDING-LEFT: 15pt" align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>(a)</FONT><FONT face=sans-serif size=2> </FONT><FONT face=serif size=2>The Company&#146;s Annual Report on Form 10-K for the year ended
  December 31, 2008, filed with the Commission on March 30, 2009;</FONT></P>
  <P style="PADDING-LEFT: 15pt" align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>(b)</FONT><FONT face=sans-serif size=2> </FONT><FONT face=serif size=2>The Company&#146;s Quarterly Reports on Form 10-Q for the quarters
  ended March 31, 2009 and June 30, 2009, filed with the Commission on May 14,
  2009 and August 13, 2009, respectively;</FONT></P>
  <P style="PADDING-LEFT: 15pt" align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>(c)</FONT><FONT face=sans-serif size=2> </FONT><FONT face=serif size=2>All other reports filed pursuant to Section 13(a) or 15(d) of
  the Securities Exchange Act of 1934, as amended (the &#147;Exchange Act&#148;) since the
  end of the fiscal year covered by the document referred to in (a) above;
  and</FONT></P>
  <P style="PADDING-LEFT: 15pt" align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>(d)</FONT><FONT face=sans-serif size=2> </FONT><FONT face=serif size=2>The description of the Company's Common Stock included in the
  Registration Statement on Form 10 (File No. 0-6890) filed in connection with the
  registration of the Company's Common Stock under Section 12(g) of the Exchange
  Act. </FONT></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>All
  documents that the Company files after the date of this prospectus pursuant to
  Section 13(a), 13(c), 14 or 15(d) of the Exchange Act, prior to the termination
  of this offering, shall be deemed to be incorporated by reference into this
  prospectus and will automatically update information in this prospectus;
  provided, however, that notwithstanding the forgoing, unless specifically stated
  to the contrary, none of the information that the Company discloses under Items
  2.02 or 7.01 of any Current Report on Form 8-K that the Company may from time to
  time furnish to the Commission will be incorporated by reference into, or
  otherwise included in, this prospectus.</FONT></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>Any
  statement contained in a document incorporated or deemed to be incorporated by
  reference herein shall be deemed to be modified or superseded for purposes of
  this Registration Statement to the extent that a statement contained herein or
  in any other subsequently filed document which also is or is deemed to be
  incorporated by reference herein modifies or supersedes such statement. Any
  statement so modified or superseded shall not be deemed, except as so modified
  or superseded, to constitute a part of this Registration Statement.</FONT></P>
  <P align=center><FONT face=serif size=2>2&nbsp;</FONT></P>
  <HR align=center width="100%" noShade SIZE=2>
  <PAGE>
  <P align=justify><B><FONT face=serif size=2>ITEM 8. EXHIBITS. </FONT></B></P>
  <P align=justify><FONT face=serif size=2>See Index to Exhibits. </FONT></P>
  <P align=center><FONT face=serif size=2>3 </FONT></P>
  <HR align=center width="100%" noShade SIZE=2>
  <PAGE>
  <P align=center><B><FONT face=serif size=2>SIGNATURES </FONT></B></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>Pursuant
  to the requirements of the Securities Act of 1933, the Registrant certifies that
  it has reasonable grounds to believe that it meets all of the requirements for
  filing on Form S-8 and has duly caused this registration statement to be signed
  on its behalf by the undersigned, thereunto duly authorized, in Albany, New
  York, on September 16, 2009. </FONT></P>
  <DIV align=right>
  <TABLE cellSpacing=0 cellPadding=0 width="50%" border=0>
  
    <TR>
      <TD noWrap align=left width="99%" colSpan=2>
        <P align=justify><B><FONT face=serif size=2>MECHANICAL TECHNOLOGY,
        INCORPORATED</FONT></B> </P></TD></TR>
    <TR>
      <TD noWrap align=left width="3%"></TD>
      <TD noWrap align=left width="96%">&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="3%"><FONT face=serif size=2>By </FONT>&nbsp; </TD>
      <TD style="BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="96%"><FONT face=serif size=2>/s/ Peng K. Lim</FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="3%">&nbsp; </TD>
      <TD noWrap align=left width="96%"><FONT face=serif size=2>Peng K. Lim</FONT>&nbsp;
      </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="3%">&nbsp; </TD>
      <TD noWrap align=left width="96%"><FONT face=serif size=2>President and Chief
        Executive Officer</FONT>&nbsp; </TD></TR></TABLE></DIV><BR>
  <P align=center><B><FONT face=serif size=2>POWER OF ATTORNEY </FONT></B></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>KNOW ALL
  PERSONS BY THESE PRESENTS, that each person whose signature to this Registration
  Statement on Form S-8 appears below hereby constitutes and appoints Peng K. Lim,
  his true and lawful attorney-in-fact and agent, with full power of substitution
  and resubstitution, for him and in his name, place and stead, in any and all
  capacities, to sign any and all amendments (including post-effective amendments)
  to this Registration Statement on Form S-8, and to file the same, with all
  exhibits thereto and other documents in connection therewith, with the
  Securities and Exchange Commission, granting unto said attorney-in-fact and
  agents full power and authority to do and perform each and every act and thing
  requisite and necessary to be done in and about the premises, as fully to all
  intents and purposes as he might or could do in person, hereby ratifying and
  confirming all that said attorney-in-fact and agents or his substitute or their
  substitutes, may lawfully do or cause to be done by virtue hereof. </FONT></P>
  <P align=justify>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<FONT face=serif size=2>Pursuant
  to the requirements of the Securities Act of 1933, this Registration Statement
  has been signed by the following persons in the capacities indicated on
  September 16, 2009. </FONT></P>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><FONT face=serif size=2>SIGNATURE</FONT>&nbsp; </TD>
      <TD noWrap align=left width="50%"><FONT face=serif size=2>TITLE</FONT>&nbsp; </TD></TR>
    <TR>
      <TD width="99%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><U><FONT face=serif size=2>/s/ Peng
        K. Lim</FONT></U>&nbsp; </TD>
      <TD noWrap align=left width="50%"><FONT face=serif size=2>President, Chief Executive
        Officer and Director</FONT>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><FONT face=serif size=2>Peng K. Lim</FONT>&nbsp;
      </TD>
      <TD noWrap align=left width="50%"><FONT face=serif size=2>(Principal Executive
        Officer)</FONT>&nbsp; </TD></TR>
    <TR>
      <TD width="99%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><U><FONT face=serif size=2>/s/
        Thomas J. Marusak</FONT></U>&nbsp; </TD>
      <TD noWrap align=left width="50%"><FONT face=serif size=2>Director</FONT>&nbsp;
    </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><FONT face=serif size=2>Thomas J.
        Marusak</FONT>&nbsp; </TD>
      <TD noWrap align=left width="50%">&nbsp; </TD></TR>
    <TR>
      <TD width="99%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><U><FONT face=serif size=2>/s/
        William P. Phelan</FONT></U>&nbsp; </TD>
      <TD noWrap align=left width="50%"><FONT face=serif size=2>Director</FONT>&nbsp;
    </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><FONT face=serif size=2>William P.
        Phelan</FONT>&nbsp; </TD>
      <TD noWrap align=left width="50%">&nbsp; </TD></TR>
    <TR>
      <TD width="99%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><U><FONT face=serif size=2>/s/ E.
        Dennis O&#146; Connor</FONT></U>&nbsp; </TD>
      <TD noWrap align=left width="50%"><FONT face=serif size=2>Director</FONT>&nbsp;
    </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><FONT face=serif size=2>E. Dennis
        O&#146;Connor</FONT>&nbsp; </TD>
      <TD noWrap align=left width="50%">&nbsp; </TD></TR>
    <TR>
      <TD width="99%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><U><FONT face=serif size=2>/s/ Dr.
        Walter L. Robb</FONT></U>&nbsp; </TD>
      <TD noWrap align=left width="50%"><FONT face=serif size=2>Director</FONT>&nbsp;
    </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="49%"><FONT face=serif size=2>Dr. Walter L.
        Robb</FONT>&nbsp; </TD>
      <TD noWrap align=left width="50%">&nbsp;
  </TD></TR></TABLE>
  <P align=center><FONT face=serif size=2>4 </FONT></P>
  <HR align=center width="100%" noShade SIZE=2>
  <PAGE>
  <P align=center><B><FONT face=serif size=2>INDEX TO EXHIBITS </FONT></B></P>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR vAlign=bottom>
      <TD style="BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="1%"><B><I><FONT face=serif size=2>Exhibit</FONT></I></B> </TD>
      <TD noWrap align=left width="1%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </TD>
      <TD style="BORDER-BOTTOM: #000000 1pt solid" noWrap align=left width="3%"><B><I><FONT face=serif size=2>Description</FONT></I></B> </TD>
      <TD noWrap align=left width="95%">&nbsp;</TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="1%"><FONT face=serif size=2>5.1</FONT>&nbsp; </TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2><FONT face=serif size=2>Opinion of Orrick, Herrington &amp; Sutcliffe
        LLP</FONT>&nbsp; </TD></TR>
    <TR>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="1%"><FONT face=serif size=2>10.1</FONT>&nbsp; </TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2><FONT face=serif size=2>Mechanical Technology, Incorporated Amended and Restated 2006
        Equity Incentive Plan</FONT>&nbsp; </TD></TR>
    <TR>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="1%"><FONT face=serif size=2>23.1</FONT>&nbsp; </TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2><FONT face=serif size=2>Consent of PricewaterhouseCoopers LLP</FONT>&nbsp; </TD></TR>
    <TR>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="1%"><FONT face=serif size=2>23.2</FONT>&nbsp; </TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2><FONT face=serif size=2>Consent of Orrick, Herrington &amp; Sutcliffe LLP (included
        in Exhibit 5.1)</FONT>&nbsp; </TD></TR>
    <TR>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2>&nbsp; </TD></TR>
    <TR vAlign=bottom>
      <TD noWrap align=left width="1%"><FONT face=serif size=2>24.1</FONT>&nbsp; </TD>
      <TD noWrap align=left width="1%"></TD>
      <TD noWrap align=left width="98%" colSpan=2><FONT face=serif size=2>Power of Attorney (included on the Signature Page to this
        Registration Statement)</FONT>&nbsp; </TD></TR></TABLE><BR>
  <HR align=center width="100%" noShade SIZE=2>
  
  </BODY>
  
  </HTML>
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metadata_filer: {"company-data": {"conformed-name": "MECHANICAL TECHNOLOGY INC", "cik": "0000064463", "assigned-sic": "3829", "irs-number": "141462255", "state-of-incorporation": "NY", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-161993", "film-number": "091076895"}, "business-address": {"street1": "431 NEW KARNER ROAD", "street2": "BUILDING #4", "city": "ALBANY", "state": "NY", "zip": "12205", "phone": "5185332200"}, "mail-address": {"street1": "431 NEW KARNER ROAD", "street2": "BUILDING #4", "city": "ALBANY", "state": "NY", "zip": "12205"}}
text: As filed with the Securities and
  Exchange Commission on September 18, 2009
  Registration No. 333-
  UNITED STATES
  SECURITIES AND EXCHANGE COMMISSION
  WASHINGTON, DC 20549
  ______________________________
  FORM
  S-8
  REGISTRATION
  STATEMENT
  UNDER
  THE
  SECURITIES ACT OF 1933
  _______________________________________
  MECHANICAL TECHNOLOGY,
  INCORPORATED
  (Exact name of registrant as
  specified in its
  charter)
  _______________________________________
  New
        York
  14-1462255
  (State or other jurisdiction of
        incorporation or
  (I.R.S. Employer Identification
        Number)
  organization)
  431 New Karner
  Road
  Albany, New York
  12205
  (Address of Principal Executive
  Offices, including zip code)
  _______________________________________
  Mechanical Technology, Incorporated
  Amended and Restated 2006 Equity Incentive Plan
  (Full title of the plan)
  Copies of
        Correspondence to:
  Peng K.
        Lim
  Brett E. Cooper,
        Esq.
  President and Chief Executive
        Officer
  Orrick, Herrington & Sutcliffe
        LLP
  431 New Karner Road
  The Orrick Building
  Albany, New York 12205
  405 Howard Street
  (518)
  533-2200
  San Francisco, CA
        94105-2669
  (Name, address, and telephone number,
        including area
  (415)
  773-5918
  code, of agent for
        service)
  _______________________________________
  Indicate by check mark whether the
  Registrant is a large accelerated filer, an accelerated filer, a non-accelerated
  filer, or a smaller reporting company. See the definitions of "large accelerated
  filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the
  Exchange Act. (Check one):
  Large accelerated filer
  o
  Accelerated filer
  o
  Non-accelerated filer
  o
  (Do not check
        if a smaller reporting company)
  Smaller reporting company
  x
  CALCULATION OF REGISTRATION FEE
  Proposed
  Proposed
  maximum
  maximum
  Title of securities
  Amount to be
  offering price per
  aggregate
  Amount of
  to be registered
  registered
  (1)
  share
  offering price
  registration fee
  Common stock,
  $0.01 par value per
  share (Common
  350,000
  $1.105
  (2)
  $386,750
  $21.58
  Stock")
  (1)
  Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as
  amended (the "
  Securities Act
  "), this registration statement shall also cover any
  additional securities that become issuable by reason of any stock dividend,
  stock split, recapitalization or other similar transaction.
  (2)
  Pursuant to Rule 457(h) under the Securities Act, the registration fee
  for the additional 350,000 shares available to be offered or sold under the
  Mechanical Technology, Incorporated Amended and Restated 2006 Equity Incentive
  Plan is based upon a price of $1.105 per share, the average of the closing of
  the bid and asked prices of the Common Stock as reported on the Pink Sheets as
  of September 17, 2009.
  PART I
  INFORMATION REQUIRED IN THE SECTION
  10(a) PROSPECTUS
  All Information required by Part I
  of Form S-8 to be contained in the prospectus is omitted from this registration
  statement in accordance with Rule 428 under the Securities Act.
  PART II
  INFORMATION REQUIRED IN THE
  REGISTRATION STATEMENT
  EXPLANATORY
  NOTE
  On June
  5, 2006, the Registrant filed with the Securities and Exchange Commission (the
  "
  Commission
  ") a Registration Statement on Form S-8 (File No. 333-134730) (the
  "
  2006 S-8
  ")
  registering 250,000 shares (as adjusted to reflect a eight-for-one reverse stock
  split effected in May 2008 (the "
  Reverse Split
  ")) of the Registrant's common
  stock, $0.01 par value per share (the "
  Common
  Stock
  "), to be issued pursuant to the
  Registrant's Amended and Restated 2006 Equity Incentive Plan ("
  2006 Plan
  ").
  This
  Registration Statement on Form S-8 registers an additional 350,000 shares of
  Common Stock that may be issued pursuant to the 2006 Plan. Pursuant to General
  Instruction E of Form S-8, this Registration Statement on Form S-8 hereby
  incorporates by reference the contents of the 2006 S-8.
  ITEM 3. INCORPORATION OF DOCUMENTS
  BY REFERENCE.
  The
  following documents, which have been filed by the Company with the Commission,
  are incorporated in this Registration Statement by reference:
  (a)
  The Company's Annual Report on Form 10-K for the year ended
  December 31, 2008, filed with the Commission on March 30, 2009;
  (b)
  The Company's Quarterly Reports on Form 10-Q for the quarters
  ended March 31, 2009 and June 30, 2009, filed with the Commission on May 14,
  2009 and August 13, 2009, respectively;
  (c)
  All other reports filed pursuant to Section 13(a) or 15(d) of
  the Securities Exchange Act of 1934, as amended (the "Exchange Act") since the
  end of the fiscal year covered by the document referred to in (a) above;
  and
  (d)
  The description of the Company's Common Stock included in the
  Registration Statement on Form 10 (File No. 0-6890) filed in connection with the
  registration of the Company's Common Stock under Section 12(g) of the Exchange
  Act.
  All
  documents that the Company files after the date of this prospectus pursuant to
  Section 13(a), 13(c), 14 or 15(d) of the Exchange Act, prior to the termination
  of this offering, shall be deemed to be incorporated by reference into this
  prospectus and will automatically update information in this prospectus;
  provided, however, that notwithstanding the forgoing, unless specifically stated
  to the contrary, none of the information that the Company discloses under Items
  2.02 or 7.01 of any Current Report on Form 8-K that the Company may from time to
  time furnish to the Commission will be incorporated by reference into, or
  otherwise included in, this prospectus.
  Any
  statement contained in a document incorporated or deemed to be incorporated by
  reference herein shall be deemed to be modified or superseded for purposes of
  this Registration Statement to the extent that a statement contained herein or
  in any other subsequently filed document which also is or is deemed to be
  incorporated by reference herein modifies or supersedes such statement. Any
  statement so modified or superseded shall not be deemed, except as so modified
  or superseded, to constitute a part of this Registration Statement.
  2
  ITEM 8. EXHIBITS.
  See Index to Exhibits.
  3
  SIGNATURES
  Pursuant
  to the requirements of the Securities Act of 1933, the Registrant certifies that
  it has reasonable grounds to believe that it meets all of the requirements for
  filing on Form S-8 and has duly caused this registration statement to be signed
  on its behalf by the undersigned, thereunto duly authorized, in Albany, New
  York, on September 16, 2009.
  MECHANICAL TECHNOLOGY,
        INCORPORATED
  By
  /s/ Peng K. Lim
  Peng K. Lim
  President and Chief
        Executive Officer
  POWER OF ATTORNEY
  KNOW ALL
  PERSONS BY THESE PRESENTS, that each person whose signature to this Registration
  Statement on Form S-8 appears below hereby constitutes and appoints Peng K. Lim,
  his true and lawful attorney-in-fact and agent, with full power of substitution
  and resubstitution, for him and in his name, place and stead, in any and all
  capacities, to sign any and all amendments (including post-effective amendments)
  to this Registration Statement on Form S-8, and to file the same, with all
  exhibits thereto and other documents in connection therewith, with the
  Securities and Exchange Commission, granting unto said attorney-in-fact and
  agents full power and authority to do and perform each and every act and thing
  requisite and necessary to be done in and about the premises, as fully to all
  intents and purposes as he might or could do in person, hereby ratifying and
  confirming all that said attorney-in-fact and agents or his substitute or their
  substitutes, may lawfully do or cause to be done by virtue hereof.
  Pursuant
  to the requirements of the Securities Act of 1933, this Registration Statement
  has been signed by the following persons in the capacities indicated on
  September 16, 2009.
  SIGNATURE
  TITLE
  /s/ Peng
        K. Lim
  President, Chief Executive
        Officer and Director
  Peng K. Lim
  (Principal Executive
        Officer)
  /s/
        Thomas J. Marusak
  Director
  Thomas J.
        Marusak
  /s/
        William P. Phelan
  Director
  William P.
        Phelan
  /s/ E.
        Dennis O' Connor
  Director
  E. Dennis
        O'Connor
  /s/ Dr.
        Walter L. Robb
  Director
  Dr. Walter L.
        Robb
  4
  INDEX TO EXHIBITS
  Exhibit
  Description
  5.1
  Opinion of Orrick, Herrington & Sutcliffe
        LLP
  10.1
  Mechanical Technology, Incorporated Amended and Restated 2006
        Equity Incentive Plan
  23.1
  Consent of PricewaterhouseCoopers LLP
  23.2
  Consent of Orrick, Herrington & Sutcliffe LLP (included
        in Exhibit 5.1)
  24.1
  Power of Attorney (included on the Signature Page to this
        Registration Statement)