Pop the hood on a classic Mazda RX-7 or RX-8 and the engine bay looks oddly empty. That is the charm of the rotary engine: a compact lump of metal that trades pistons and valves for a spinning ...

Developing a gasoline-powered rotary engine was a dream for Felix Wankel, and we mean that literally. Some steam engines worked on the same basic principle as far back as the 18th century, but the ...

Holy smokes, this diesel engine is small. It's like holding the power of a reliable Cummins diesel engine in the palm of our hand. Okay, maybe that's a bit of an exaggeration, and sounds a bit too ...