The Osella PA5 is a Group 6 (Sports 2000) prototype racing car designed, developed, and built by Osella, to compete in the World Sportscar Championship sports car racing series between 1977 and 1981.

It was powered by a number of different engines, including the 2.0 L (120 cu in) BMW M12/7, Hart 420R, and the Cosworth BDG.

The 1.6 L (98 cu in) and 1.8 L (110 cu in) Cosworth FVA and Cosworth FVC were also used.

It was even powered by a Ferrari 2.0 V8 engine.

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