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 ...

Rotary engines have been around as a niche solution in cars since 1961, but were made famous in automotive culture by Mazda using the Wankel single triangle-shaped rotary piston design. Mazda used a ...

Mazda has long had a knack for crafting beautiful concept cars, and at the Japan Mobility Show, it reminded everyone of that talent by revealing two of them. The standout is the Vision-X Coupe, a ...

The Renault R5 Turbo, a mid-engine rally homologation special based on a front-wheel drive hatchback, is not a subtle car to begin with. It might be even less subtle with an unusual engine in its ...

Forbes contributors publish independent expert analyses and insights. Peter Lyon is based in Tokyo and writes about the car industry. At the Japan Mobility Show two years ago, Mazda unveiled a ...

A Wankel engine is a type of rotary engine, but not all rotary engines are Wankel engines. Wrapping your mind around this idea will help you to better understand the similarities as well as the ...

Rotary engines (also known as Wankel engines and Wankel rotary engines) are quite different from piston or "reciprocating" engines. One of the distinguishing features is that they don't need valves to ...

How the 13B-MSP Renesis evolved from earlier Mazda rotary designs, technical features explained, and common problems and maintenance issues discussed. The 13B-MSP Renesis rotary engine powered the ...