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 iconic rotary car engine, thought to have been consigned to the dustbin of impractical technology, is making a comeback in Japan from the very automaker that introduced the system as far back ...

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 ...

RM Sotheby’s is handling the sale of this automotive curiosity ... retaining the original two-rotor Wankel engine which produced 113 hp back in the day, funneled through a three-speed automatic ...

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 ...

Not only is the twin-rotor 1.3L RENESIS rotary engine the only one of its kind, but no other car in the class offers four doors. Add to the mix crisp handling and an entry price of just over $26,000, ...

Mazda's persistent use of the rotary engine is perhaps the perfect example ... As of 2024, the Mazda6 is no longer on sale in North America. That's quite unfortunate, because it was one of ...

Mazda is once again manufacturing the rotary engine, but before you get too excited thinking it’ll be found in a sporty RX-7 successor, best temper those expectations. That’s because the new ...

This paper considers the sensitivity of an open-rotor engine to variations of three operational parameters during take-off, focusing on both aerodynamics and aeroacoustics. Via a sensitivity analysis, ...

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 offers four doors. Add to the mix an attractive entry price, and the RX-8 easily ...