You'd think measuring an engine's displacement would be simple, but there's a long history of trying to figure out how to ...

The rotary engine has been absent on the frontline for quite some time, and it's on the way back. But not with Mazda.

The mind-bending world of birotary engines - a hybrid of piston and rotary technology that could revolutionize aviation. But ...

For more than a decade the name Wankel has popped up whenever car enthusiasts start talking about advanced-design automotive powerplants. The theory of the Wankel engine goes back to 1954 when Dr.