The four-stroke Otto cycle engine is the reigning king of internal combustion (in the diesel-averse United States, at least), which makes it easy to forget about all those other wacky would-be ...

Over-engineered engines like the 36-cylinder Lycoming XR-7755 and Napier Deltic's triangular nightmare made mechanics weep ...

Years after World War II came to an end, Great Britain realized that it needed engines that had incredible power, but didn't take up too much space. Napier answered the call with the Deltic, as the ...