2 Stroke Engines Vs 4 Stroke Engines
The Difference between a 2-stroke and a 4-stroke engine is how quickly this combustion cycle process occurs, based on the number of times the piston moves up and down during each cycle.
The main difference between a 4-stroke engine and a 2-stroke engine is that a 4-stroke engine goes through four stages, or two complete revolutions, to complete one power stroke, while a 2-stroke engine goes through 2 stages, or one complete revolution, to complete one power stroke.
Two Strokes | Four Strokes |
| It has one revolution of the crankshaft during one power stroke | It has two revolutions of the crankshaft during one power stroke |
| It generates high torque | It generates less torque |
| Its uses port for fuel’s outlet and inlet | It uses valves for outlet and inlet of a fuel |
| Its engines result in lesser thermal efficiency | Its engines result in higher thermal efficiency |
| It has a larger ratio in terms of power to weight | It has a lesser ratio in terms of power to weight |
| It generates more smoke and shows less efficiency | It generates less smoke and shows more efficiency |
| Requires more lubricating oil as some oil burns with the fuel | Requires less lubricating oil |
| Due to poor lubrication, more wear and tear occurs | Less wear and tear occurs |
| Engines are cheaper and are simple for manufacturing | Engines are expensive due to lubrication and valves and are tough to manufacture |
| Engines are basically lighter and are noisy | Engines are basically heavier because its flywheel is heavy and are less noisy |