The Umpqua Flatheads Car Club has been around for so long that it was one of the original clubs involved in organizing ...

To this day, the Mazda 787B is the only rotary-powered car to win at Le Mans. While it survived the 24-hour endurance race, ...

Getting straight out of the RX and into the MX is a reminder of how safe, comfortable and flabby modern cars are. The MX-30 ...

A normal Wankel has a triangle rotor spinning in a peanut-shaped housing. Liquid Piston flips that; now the peanut rotor spins inside a triangle housing. That small change makes a big difference ...

I have already written about LiquidPiston and its XTS-210, but Avadi's idea is even more striking: it is a reciprocating engine that works as a rotary. Imagine an ICE with a single piston.

INNengine's half-liter opposed-piston engine makes 120 horsepower in an ultra-compact, super-efficient package.

Essentially the rotary engine operates with the same basic principles as the common piston engine, with the four-stroke sequence of inlet, compression, combustion and exhaust strokes producing the ...

All-new type of gas engine offers incredible power-to-weight U.S. firm Avadi – using a Quebec inventor's design – has developed a sort of "rotary piston" ICE that could revolutionize small engines ...