Strange engine configurations that never reached production always makes for interesting reading. Here are our favorites.

A rotary may come, but it might not be what you're hoping for. Mazda debuted its rotary engine 50 years ago in the Cosmo Sport in part as a way to stand out from its larger Japanese competitors.

Mazda's Wankel rotary engine has always been unique in the automotive landscape as a mass-produced internal combustion engine that eschews such unsightly items as pistons, valves and camshafts.

Still, their distinctive sound and quirky construction earned them fans and enthusiasts worldwide — and no, we're not just talking about Mazda. Since the rotary engine's arrival, enthusiasts ...

The rotary engine offers vibration-free operation, compact size, and high power output compared to traditional engines. Mazda did not invent the rotary engine but were instrumental in furthering ...

The Wankel rotary engine, most notably used in automobiles by Mazda, has been around since the late 1950’s. The Wankel rotary is an example of a design which makes sense on paper. However ...

2017 marks fifty years since Mazda produced ... to-rear balance as all rotary-engined cars. Mazda’s example also features a few tweaks, not least a later 12A engine from an RX-7, and an RX ...

Mostly. The rotary engine became part of the soul of Mazda, and if it can be a bit flawed in operation, at least it has true character. And this low-mileage 2011 RX-8 for sale on Bring a Trailer ...

There's a hybrid system borrowed from Toyota, plus a copycat "strong hybrid" setup to come from within Mazda eventually, maybe with rotary engine power. In the U.S. and Japan, where Mazda has ...

These estimates do not include title, registration fees, lien fees, or any other fees that may be imposed by a governmental agency in connection with the sale ... of his rotary engine is awesome!, ...

One thing Mazda never managed to solve however, was the problem with fuel consumption, and although the latest generation of Renesis rotary engines were far more efficient than its predecessors ...

On Sept. 14, the automaker unveiled its first rotary engine-mounted passenger car for the Japanese market in 11 years. The vehicle in question is the plug-in Mazda MX-30 Rotary-EV gas-electric ...