COMPARISON OF 2-STROKE AND 4-STROKE ENGINES: Two-stroke engine possesses the following advantages over the four stroke type:
1. Because of its valueless construction, the two-stroke engine is simpler, more compact, lighter and consequently cheaper to manufacture.
2. Due to twice as many power strokes per revolution, compared to the four stroke type, it delivers smoother torque. However, at lower speeds, this may not happen due to poor scavenging which may give rise to 'four stroke' or irregular firing.
3. The pet roil system of lubrication which has to be used in case of 2-stroke engines, is simpler.