A new kind of car has joined the five-second quarter-mile club. It’s a Mazda 13B-powered racer nicknamed the “Grey Bullet.” ...

There are many different forms of internal combustion engines, but most use the same basic principle. Explosions in the combustion chamber move pistons up and down to spin a crankshaft. That ...

You'd think measuring an engine's displacement would be simple, but there's a long history of trying to figure out how to categorize the Wankel.