Pistons play the ultimate role in an engine, but despite that, it's still hard to fully wrap your head around all the forces involved. There are plenty of moving parts in an internal combustion engine ...

Picture a large-displacement piston engine in your mind. Perhaps the first image to come up is an engine you'd see in construction equipment, like the 20-cylinder quad-turbo 106-liter powerplant from ...

The rotary engine was an unconventional design that delivered great power for its size. Here's what's good and bad about it.

The story of how Honda developed an oval-piston race engine that ultimately failed but still made history along the way. Honda pioneered oval piston technology in the 1970s for four-stroke racing ...