Which engine is powerful: Tow storke engine or four storke engine? And why?

two stroke

this engines slow speed and big hp up 5000 hp to 20000 hp as main marine engine and power plants

2 Stroke engines are more powerful that 4 stroke engines.

Why? Because 2 stroke engine produces power on every rotation of the crankshaft compared to every 2 rotations of the crankshaft in 4 stroke engine. So theoretically, 2 stroke engine produces double the power for every cycle compared to 4 stroke, but then 2 stroke engines are less fuel efficient and produce low torque at low RPMs