There are no strokes in Wankel Engine.

The Wankel engine is a type of internal combusion engine that uses a unique design to convert pressure into a rotational motion. It was invented by a German, Frank Wankel, and was first patented in 1929.

wankel rotary engine

In a Wankel engine, all parts rotate in one direction, while in a reciprocating engine, pistons move back and forth

The Wankel rotary engine is a differing type of engine as opposed to the standard piston engine. The Mazda line of cars is the one that uses this type of engine.