Mazda is testing a Mazda2 EV hatchback with a luggage-sized single-rotor 330cc Wankel engine. The compact range-extending 26 hp engine spinning at an optimum 2,000 rpms automatically recharges the system. Quasi-turbine/Wankel engines will be sadly missed because Mazda has declared they will not be developing any more primary rotary engines for future models.
Mazda 2 EV range extender prototype first drive Review | Autocar