Rotary engines come in all sorts of shapes and sizes. They can be as large as this six-rotor unit powering a Mazda RX-4 drag car in New Zealand, or as small as this 2.4-cc single-rotor engine above.

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

A Mazda RX-8 revving to 10,000 RPM is already special — but on the Nürburgring, it becomes unforgettable. The rotary engine ...

Toyan, a company that makes working miniature engines, has made what is claimed to be the world’s smallest rotary engine. Despite its tiny stature, the 0.0024-liter engine can still howl. Purchased by ...

The traditional piston engine has garnered the vast majority of attention and application in the internal combustion age, but there was another: the Wankel rotary engine. German engineer Felix Wankel ...

Rob Dahm, notorious rotary-powered car builder, has firmly jumped into the deep end of the pool with his latest project: The world's only 15.7-liter, tri-turbo Y12 rotary engine. If that doesn't make ...