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

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

The first time the public saw the 1968 Mazda Cosmo, it looked like a spaceship that had somehow slipped onto a show stand.

Perfectly tuning the heat range of an engine's spark plugs is something of a dark art to all but the most well versed tuners and the engineering egg heads at automotive OEMs. Getting the spark plug ...

Mazda is forced to increasingly depend on its US-based production facility in Huntsville, Alabama, which is a joint ...

The Wankel rotary engine is known for its troubled life in the mainstream automotive industry, its high power-to-weight ratio, and the intoxicating buzz it makes at full tilt. Popular with die-hard ...

Click to open image viewer. The first successful rotary engine is generally attributed to the American F.O. Farwell in 1896; but the French Gnome, developed by the Seguin brothers, was much more ...

While modern engines feature many tweaks and improvements on the original ideas, they usually aren't as interesting as the strange contraptions engineers experimented with in the early days. Take, for ...