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

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 ...

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 ...

Small engine manufacturer LiquidPiston is developing a tiny, lightweight, super-efficient engine that functions a lot like Wankel rotary units ... are likely to be used in niche market products ...

which used so few moving parts. Mazda Acquired A Licensing Agreement And Began Developing Their Own Rotary Engines While many manufacturers explored the new tech, no one had more success than the ...

There was the RX-Vision concept revealed at Tokyo back in 2015, but a production version never materialised, and while there’s been talk of a rotary engine being used as a range extender for ...

The 2009 Mazda RX-8 offers a unique driving experience in the automobile world. Not only is the twin-rotor 1.3-liter RENESIS rotary engine the only one of its kind, but no other car in the class ...

If you exceed the payload limit, it puts more strain on the engine and causes increased wear ... For example, Ford and Ram say that one should be used when towing over 5,000 lbs or a tongue ...

Mazda has been playing with the rotary range-extender idea for years. In the RE prototype, the engine was exclusively used to charge the lithium-ion batteries when they were running low ...

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 ... hybrid system used by Mazda, but ...

That’s because the new rotary engine is being used in the MX-30 EV plug-in hybrid as a small and innovative range extender. As a result the new rotary engine is a much lower-output unit than ...

Access to the rear seats is made easy by "free style" rear opening doors. Engine performance is brought by a naturally-aspirated 1.3L rotary engine making 232 horsepower at 8500 rpm (212 horsepower at ...