Mazda 8C

The Mazda 8C is a single-rotor Wankel engine that Mazda developed to work as a generator in the MX-30 e-Skyactiv R-EV plug-in hybrid. It is based on the larger 120 mm rotor radius layout of the rare 13A, with a 17.5 mm eccentric offset and a depth of 76 mm, and it displaces 830 cc. It uses gasoline direct injection and a compression ratio of 11.9 to 1, together with exhaust gas recirculation, plasma spray coatings on the housing interiors and aluminium side housings that save 15 kg. In the MX-30 it does not drive the wheels directly: it supplies electric power for the motor that spins the front axle, which let Mazda build its first front-wheel drive rotary vehicle. Mazda states that the engine improves fuel economy by as much as 25 percent.