In 1980, the company commenced delivery of the VAZ-411 twin-rotor Wankel engine in VAZ-2106s and Lada cars, with about 200 manufactured. Source: Internet
Suzuki chose a single rotor that was fairly smooth, however with rough patches at 4,000 rpm; Garside opted for a turbine-smooth twin-rotor motor. Source: Internet
Experimental aircraft with Wankel engines use propeller speed reduction units, for instance the MidWest twin-rotor engine has a 2.95:1 reduction gearbox. Source: Internet