Rotary engines differ from conventional ones in many respects — and one of them is the fact that they use two different spark ...

In theory, Wankel-style rotary internal combustion engines have many advantages: they ditch the cumbersome crankcase and piston design, replacing it with a simple, single-chamber design and a thick, ...

In the late 1960s, when most sedans still looked and drove like rolling conservatism, NSU put a radical four-door on the road ...

The rotary was the most radical rethink of the combustion engine in over a hundred years — and it paid the price for being different. Mazda introduced the innovative Wankel rotary engine in the 1967 ...