Mazda 13B rotary engine in a white Mazda RX-7 engine bay. - TTTNIS/Wikimedia Commons When it comes to unconventional engine design, few exceed the Wankel rotary in terms of weirdness. Despite that, ...

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

Napier’s two-stroke 18-cylinder diesel engine is one of the most diverse—and insane—combustion engines ever produced.

A blasphemy to some and very cool to others, diesel-powered sports cars rarely made it past the concept stage. Among the ...

Automobiles were still in their relative infancy in 1905, but they had been growing more popular for years. There was a ...