How does Wankel engine working principal is different than normal 4 stroke engine?

The Wankel engine operates on a rotary design, using a triangular rotor that moves in an epitrochoidal path within a housing, resulting in continuous rotation and fewer moving parts compared to a traditional 4-stroke engine. In contrast, a 4-stroke engine relies on a linear reciprocating motion of pistons, completing four distinct strokes (intake, compression, power, exhaust) in two revolutions of the crankshaft. This fundamental difference in design leads to variations in efficiency, power delivery, and size, with the Wankel engine often being more compact and smoother in operation. However, it typically has lower thermal efficiency and higher emissions compared to conventional piston engines.