CLEAN DIESEL TECHNOLOGIES, INC.
- --------------------------------------------------------------------------------
300 ATLANTIC STREET, SUITE 702, STAMFORD, CT 06901-2522 TEL: (203) 327-7050
FAX: (203) 323-0461


          NEWS RELEASE FOR APRIL 3, 2007 AT 2:30 AM EST AND 7:30 AM GMT
          -------------------------------------------------------------

                         CLEAN DIESEL TECHNOLOGIES, INC.
                REPORTS FOURTH QUARTER AND YEAR END 2006 RESULTS

Stamford,  CT...Clean  Diesel Technologies, Inc. ("Clean Diesel Technologies" or
the  "Company")  (OTC-BB:  CDTI,  AIM:  CDT/CDTS  &  XETRA: CDI), a developer of
technological  solutions to reduce harmful engine emissions, today announced its
results  for  the  fourth  quarter  and  year  ended  December  31,  2006.

Clean  Diesel  Technologies reported total revenue increased 38.3% ($311,000) in
2006  to  $1,123,000 compared to $812,000 in 2005.  The 2006 increase in revenue
was due to additive revenue, license and royalty revenue and consulting projects
completed  in  2006.  Revenue  for the fourth quarter of 2006 increased 26.9% to
$236,000  compared  to  $186,000 in the fourth quarter of 2005.  The increase in
revenue in the fourth quarter of 2006 was primarily attributable to additive and
hardware revenue.  Net loss for the year ended December 31, 2006 was $5,384,000,
or  $0.21  loss per share, compared to the 2005 net loss of $5,426,000, or $0.30
loss  per  share.  Net  loss  for  the fourth quarter of 2006 was $1,496,000, or
$0.06  loss  per  share,  as  compared to the fourth quarter of 2005 net loss of
$1,460,000,  or  $0.07  loss  per  share.

The Company's total operating costs and expenses for the year ended December 31,
2006 were $6,681,000 compared to $6,043,000 in 2005, an increase of $638,000, or
10.6%,  and  included  $304,000  of non-cash charges for the fair value of stock
options  granted  (in accordance with SFAS No. 123R which the Company adopted in
January 2006).  Excluding the stock option charge, the total operating costs and
expenses  increased  5.5%  in relation to the prior year.  Also included in 2006
operating  costs  and  expenses  are  severance  charges of $357,475 (due to the
departure  of the Company's former president and chief operating officer who had
been  released  from employment in January 2006) and the full year effect of the
Company's  executive  vice  president,  North  American  operations  and  chief
technology  officer  who  was  hired  in  August  2005.



Commenting  on the results, Dr. Bernhard Steiner, President and CEO, said: "2006
was  a significant year for Clean Diesel Technologies' development with a strong
focus  on  moving the sales and marketing activities forward, a key component of
which was expanding our distribution partners in North and South America, Europe
and  Asia.  The  net  loss from operations reflects this increased investment in
sales  and  marketing.  Clean  Diesel  Technologies  finished the year with $5.3
million  in  cash and the expectation of collecting another $4.3 million (net of
expenses)  from  subscriptions.  I  am  pleased that we successfully completed a
private placement in December 2006.  For that, we are grateful to our supportive
stockholders."

Dr.  Steiner  continued,  "The combination of increasingly stringent legislation
and  expanding  financial incentives in the global emissions market, underpinned
by  strengthening  demand  for  environmental best practice and dramatic cuts in
greenhouse gas emissions, is expected to drive the market in 2007 and throughout
the rest of the decade.  The escalating need for clean air and energy efficiency
provides significant opportunities for Clean Diesel Technologies' existing range
of  products  and  solutions  also  for  its  future  innovations."

"Our  expanded distribution network, additional patents, technology developments
and  investment  in  sales  and  marketing  should  all provide the Company with
enhanced  revenue  opportunities in 2007 and beyond.  We are now well positioned
for  the  next  stage  of  growth  and  look  forward  to 2007 with confidence."


Clean  Diesel  Technologies, Inc. is a clean energy and environmental technology
company  supplying  proprietary pollution control systems technologies to reduce
harmful emissions from internal combustion engines while improving fuel economy,
resulting  in "cleaner air" and reduced "greenhouse gas" emissions.  The Company
has  four  main  technology  areas:  Platinum  Plus(R)  fuel-borne catalysts for
emission  control  and  fuel  economy  improvement  in  diesel  engines; ARIS(R)
selective  catalytic  reduction  (SCR)  technology for control of nitrogen oxide
(NOx)  emissions  from  diesel  engines;  catalyzed wire mesh diesel particulate
filters  to  reduce particulate matter and other regulated engine emissions; and
biofuels technology, which includes the low emission Biodiesel Plus(TM) formula.
For  additional  information,  you  may review our Annual Report on Form 10-K as
filed  with  the  Securities  and  Exchange  Commission.



About  Clean  Diesel  Technologies,  Inc.
- -----------------------------------------
Clean  Diesel  Technologies,  Inc.  and  its  UK  Branch  office,  Clean  Diesel
International  LLC,  is a developer of technological solutions to reduce harmful
engine  emissions.  Clean  Diesel Technologies has patented products that reduce
emissions  from  combustion  engines while simultaneously improving fuel economy
and  power.  Products  include  Platinum Plus(R) fuel-borne catalysts (FBC), the
Platinum  Plus  Purifier  System,  catalyzed wire mesh diesel particulate filter
technologies and the ARIS(R) injection systems for selective catalytic reduction
of  NOx.  Platinum  Plus  and  ARIS  are  registered  trademarks of Clean Diesel
Technologies,  Inc.  For  more information, visit CDT at www.cdti.com or contact
                                                         ------------
the  Company  directly.


Certain  statements in this news release constitute "forward-looking statements"
within  the  meaning  of  the  Private Securities Litigation Reform Act of 1995.
Such  forward-looking statements involve known or unknown risks, including those
detailed  in  the  Company's  filings  with  the  US  Securities  and  Exchange
Commission,  uncertainties and other factors which may cause the actual results,
performance  or  achievements  of  the  Company,  or  industry  results,  to  be
materially  different  from  any  future  results,  performance  or achievements
expressed  or implied by such forward-looking statements.  Readers are cautioned
not  to  place  undue  reliance on these forward-looking statements, which speak
only  as  of  the  date  hereof.

                               -- Tables Follow --





CLEAN DIESEL TECHNOLOGIES, INC.
STATEMENT  OF  OPERATIONS

(in thousands, except per share data)
                                             THREE MONTHS ENDED        YEARS ENDED
                                                DECEMBER 31,           DECEMBER 31,
                                          ----------------------  ----------------------
                                             2006        2005        2006        2005
                                          ----------  ----------  ----------  ----------
                                                                  
REVENUE:
Additive revenue                          $     134   $     128   $     591   $     411
Hardware revenue                                 78          35         269         349
License and royalty revenue                      24          23          74          47
Consulting and other                              -           -         189           5
                                          ----------  ----------  ----------  ----------
Total revenue                                   236         186       1,123         812

COSTS AND EXPENSES:
Cost of revenue                                 180          99         658         471
General and administrative                    1,405       1,328       5,278       4,963
Research and development                         63          69         510         439
  Patent amortization and other expense          89          45         235         170
                                          ----------  ----------  ----------  ----------

LOSS FROM OPERATIONS                         (1,501)     (1,355)     (5,558)     (5,231)
Foreign currency exchange gain (loss)             3        (115)        104        (221)
Interest income                                   2          10          58          26
Other                                             -           -          12           -
                                          ----------  ----------  ----------  ----------
NET INCOME (LOSS)                         $  (1,496)  $  (1,460)  $  (5,384)  $  (5,426)
                                          ----------  ----------  ----------  ----------

Basic and diluted loss per common share   $   (0.06)  $   (0.07)  $   (0.21)  $   (0.30)
                                          ----------  ----------  ----------  ----------

Basic and diluted weighted-average
  number of common shares outstanding        26,276      22,027      26,059      18,389






CLEAN DIESEL TECHNOLOGIES, INC.
CONSOLIDATED  BALANCE  SHEETS

(in thousands, except share data)

                                                                     DECEMBER 31,
                                                                ----------------------
                                                                   2006        2005
                                                                ----------  ----------
                                                                      
ASSETS
CURRENT ASSETS:
Cash and cash equivalents                                       $   5,314   $   4,513
Accounts receivable, net of allowance of
  $34 and $11, respectively                                           100         125
Inventories, net                                                      365         285
Other current assets                                                   96          94
Subscription receivable, net                                        2,412         488
                                                                ----------  ----------

  Total current assets                                              8,287       5,505
Patents, net                                                          603         567
Fixed assets, net of accumulated depreciation of
  $350 and $259, respectively                                          91         175
Other assets                                                           37          27
                                                                ----------  ----------

Total assets                                                    $   9,018   $   6,274
                                                                ----------  ----------

LIABILITIES AND STOCKHOLDERS' EQUITY
CURRENT LIABILITIES:
Accounts payable                                                $      30   $     170
Accrued expenses                                                      740         317
Deferred revenue                                                        -           9
                                                                ----------  ----------
  Total current liabilities                                         1,070         496

Commitments

STOCKHOLDERS' EQUITY:
Preferred stock, par value $0.05 per share,
  authorized 100,000; no shares issued and outstanding                  -           -
Common stock, par value $0.05 per share:
  authorized 45,000,000 and 30,000,000 shares,
    respectively; issued and outstanding 29,822,468 and
    25,369,358 shares, respectively                                 1,491       1,269
  subscribed and to be issued 3,339,994 and 705,113
    shares, respectively                                              167          35
Additional paid-in capital, net of subscriptions receivable of
  $1,901 at December 31, 2006                                      51,263      44,067
Accumulated other comprehensive income                                  4           -
Accumulated deficit                                               (44,977)    (39,593)
                                                                ----------  ----------

  Total stockholders' equity                                        7,948       5,778
                                                                ----------  ----------

  Total liabilities and stockholders' equity                    $   9,018   $   6,274
                                                                ----------  ----------






CLEAN DIESEL TECHNOLOGIES, INC.
CONSOLIDATED STATEMENTS OF CASH FLOW

(in thousands)

                                                                          FOR THE YEARS ENDED DECEMBER 31,
                                                                         ----------------------------------
                                                                            2006        2005        2004
                                                                         ----------  ----------  ----------
                                                                                        
Operating activities
Net loss                                                                 $  (5,384)  $  (5,426)  $  (4,143)
Adjustments to reconcile net loss to cash used in operating activities:
  Depreciation and amortization                                                138         163         132
  Provision for inventory                                                       27          43           -
  Provision for doubtful accounts, net                                          23          12           -
  Compensation expense for stock options                                       304           -          88
  Loss on disposition/abandonment of fixed assets/patents                       23          33          19
Changes in operating assets and liabilities:
  Accounts receivable                                                            2           7         (40)
  Inventories                                                                 (107)         59         (76)
  Other current assets and other assets                                        (12)        (23)         (7)
  Deferred compensation and pension benefits                                     -           -        (306)
  Accounts payable and accrued expense                                         678         167          21
  Deferred revenue                                                              (9)          9           -
                                                                         ----------  ----------  ----------
    Net cash used for operating activities                                  (4,317)     (4,956)     (4,312)
                                                                         ----------  ----------  ----------
Investing activities
Patent costs                                                                   (94)       (235)       (186)
Purchase of fixed assets                                                       (20)        (85)       (164)
                                                                         ----------  ----------  ----------
    Net cash used for investing activities                                    (114)       (320)       (350)
                                                                         ----------  ----------  ----------
Financing activities
Proceeds from issuance of common stock, net                                  5,214       5,522       2,408
Proceeds from exercise of stock options                                         14           2           1
Proceeds from broker fee credit                                                  -           -           3
                                                                         ----------------------------------
    Net cash provided by financing activities                                5,228       5,524       2,412
                                                                         ----------  ----------  ----------
Effect of exchange rate changes on cash                                          4           -           -
Net increase (decrease) in cash and cash equivalents                     $     801   $     248   $  (2,250)
Cash and cash equivalents at beginning of the year                           4,513       4,265       6,515
                                                                         ----------  ----------  ----------

Cash and cash equivalents at end of the year                             $   5,314   $   4,513   $   4,265
                                                                         ----------  ----------  ----------

Supplemental non-cash activities:
  Common stock subscribed, net                                           $   4,313   $     488   $       -
  Payment of accrued directors' fees in common stock                            94          70          57
  Stock issued as payment for deferred compensation                              -           -         135




FOR  FURTHER  INFORMATION:

CLEAN DIESEL TECHNOLOGIES, INC                    http://www.cdti.com
Dr. Bernhard Steiner, CEO & President             -------------------
Email: bsteiner@cdti.com                          300 Atlantic Street, Suite 702
       -----------------                          Stamford, CT 06901-3522
Ann Ruple, CFO & Vice President Administration    Tel: +1 (203) 327-7050
Email: aruple@cdti.com
       ---------------

J. M. FINN & CO. LTD                              www.jmfinn.com
Matthew Robinson                                  --------------
matthew.robinson@jmfinn.com                       Tel: +44 (0) 207 628 9688
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MEDIA / INVESTOR  ENQUIRIES:
ABCHURCH COMMUNICATIONS                           www.abchurch-group.com
Heather Salmond / Justin Heat                     ----------------------
Email: heather.salmond@abchurch-group.com         100 Cannon Street, London
       ----------------------------------         EC4N 6EU
Email: justin.heath@abchurch-group.com            Tel: +44 (0) 20 7398 7700
       -------------------------------


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