The mind-bending world of birotary engines - a hybrid of piston and rotary technology that could revolutionize aviation. But ...

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

Everyone generally knows about piston and rotary engines, with many a flamewar having been waged over the pros and cons of each design. The “correct” answer is thus to combine both into a single ...

Meet the Birotary, a crazy new and complicated engine that has three cylinders arranged like a star, a rotating block, a ...

The rotary engine, previously a staple in Mazda's lineup, is an engine design that foregoes the round piston and singular chamber of a regular reciprocal internal combustion engine. Instead, the ...

In theory, Wankel-style rotary internal combustion engines have many advantages: they ditch the cumbersome crankcase and piston design, replacing it with a simple, single-chamber design and a thick, ...

Liquid Piston has taken its revolutionary engine out for a spin. The Connecticut-based startup has been developing a tiny new type of rotary engine for several years that’s so innovative it received a ...

Mazda stunned the world with the RX-Vision concept last year and now we have the first details on its new rotary engine. Currently under development, Mazda’s next-generation rotary engine has been the ...

Longtime friend of Jalopnik and myself, Tom Jennings, is a huge Rambler fan and walking, moist column of Rambler-knowledge, so when he encounters something Rambler-related he wasn't aware of, you know ...

A government-backed research institute is funding work to develop a hybrid-electric powertrain based on a new version of the Wankel piston engine that is now being used to power Mazda's new RX-8 car.