Not every engine has a set of pistons that move up and down in a cylinder. The Wankel, or rotary engine, delivers its power with rotational force rather than a reciprocating mass that hammers out ...

In the late 1960s, when most sedans still looked and drove like rolling conservatism, NSU put a radical four-door on the road with a smooth rotary heart and a shape that seemed to have rolled in from ...