Astron aerospace has shown a partial prototype of a new rotary combustion engine it claims runs at an extraordinary 60% thermal efficiency, burning totally clean with zero NOx emissions and nothing ...

Part 2: Must-read advice from expert Jim Mederer for anyone interested in a rotary engine. Few people outside of Mazda's RE research department know more about rotary-powered Mazdas than Jim Mederer, ...

The rotary engine is unique in its success and failure and its ability to make an impact with a completely different way of thinking. As it is, every production car for the last 130 years, aside from ...

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 ...

It rose to prominence in the Mazda RX-7 model line, but the last new car feature one was the Mazda RX-8. Since then, Mazda has been continually developing the technology with the aim of bringing it ...

For years, we've heard rumors that Mazda was going to bring back the rotary engine and give us a new sports car as a successor to the RX-7 and RX-8. And yet, arguably unsurprisingly, it hasn't ...

Over-the-top rotary builds are an enthusiast tradition. Because so few rotary cars have been made, the limits of the engine type haven't been fully exploited by automakers. It's been tuners who have ...

Another day, another Mazda rotary engine story, except this time, it’s from the automaker itself instead of a third-party speculator. Mazda announced a new division to “accelerate its research and ...

The Mazda Iconic SP concept of the 2023 Japan Mobility Show was the sign of a new Mazda sports car that we’ve been awaiting for a decade—no, two. The Wankel rotary-powered, popup headlight-equipped ...

The rotary engine is perhaps one of the most polarizing motors to have ever been commercialized. From its checkered past to its intent to live on as a range extender, the small spinning triangle has ...