<TABLE> <S> <C>
<PAGE>
<ARTICLE> 5
<LEGEND>
(QUARTERLY SEC REPORT FINANCIAL SUMMARY)
</LEGEND>
<CIK> 0000914539
<NAME> ROTARY POWER INTERNATIONAL, INC.
<MULTIPLIER> 1
<CURRENCY> $US
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<EXCHANGE-RATE> 1
<CASH> 78,486
<SECURITIES> 0
<RECEIVABLES> 731,488
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<PP&E> 496,500
<DEPRECIATION> 0
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<CURRENT-LIABILITIES> 3,531,575
<BONDS> 4,611,365
0
750
<COMMON> 95,000
<OTHER-SE> 0
<TOTAL-LIABILITY-AND-EQUITY> 2,187,085
<SALES> 31,200
<TOTAL-REVENUES> 31,200
<CGS> 43,807
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<OTHER-EXPENSES> (25,911)
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<INTEREST-EXPENSE> 326,943
<INCOME-PRETAX> (918,882)
<INCOME-TAX> (918,882)
<INCOME-CONTINUING> 0
<DISCONTINUED> 0
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<CHANGES> 0
<NET-INCOME> (918,882)
<EPS-BASIC> (.14)
<EPS-DILUTED> (.12)
</TABLE>