R26B
The most prominent 4-rotor engine from Mazda, the 26B, was used exclusively for various Mazda-built sports prototype cars (including the 767 and 787B) in replacement of the older 13J. In 1991 the 26B-powered Mazda 787B became the first Japanese car and the first car with anything other than a reciprocating piston engine to win the 24 Hours of Le Mans race outright. As of 2012, it is still so far the only car to hold these distinctions. The 26B engine displaced 2622 cc and developed 700 hp (522 kW) at 9000 rpm. The engine design utilizes peripheral intake ports, continually variable geometry intakes, and an additional (third) spark plug per rotor.
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