This is the only piston-less race car to ever win the 24 Hours of Le Mans

1991 Mazda 787B four-rotor race carEvery car that's won the 24 Hours of Le Mans has had a conventional piston engine—except one. That's the Mazda 787B, which won the legendary French endurance race in 1991, after 17 years of trying. As detailed in this Mazda-produced video, the 787B was powered by a rotary engine, similar to what was still being used in the Mazda RX-7 sports...

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