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 ...

There’s a new spin on the rotary engine. Liquid Piston, a Connecticut-based engineering firm, has turned the classic Wankel engine design inside out to create a more efficient, and cleaner-burning ...

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

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 ...

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 ...

Every few weeks I receive word at the office that some tinkering genius has revolutionized the internal-combustion engine. These notices arrive on pages still smelling of Damascus lightning, and ...

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 ...

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 ...

Rotary engines aren't perfect. They're known to burn oil, blow seals, make very little torque and above all, not do so hot on EPA fuel economy drive cycles. Despite all that, there's something about ...