What is the difference between a Two Stroke and a Four stroke engine?

Question

Accepted Answer

Two stroke engines have power strokes every revolution, while four stroke engines have power strokes every other revolution.

Two stroke engines have a simpler design with fewer moving parts compared to four stroke engines.
Two stroke engines require a fuel-oil mixture for lubrication, while four stroke engines have a separate oil reservoir.
Two stroke engines are lighter and have a higher power-to-weight ratio than four stroke engines.
Examples of two stroke engines include chainsaws and dirt bikes, while examples of four stroke engines include cars and motorcycles.

Accepted Answer

Both engines use the combustion cycle to produce energy. The main difference between a 2- and 4-stroke engine is that a 4-stroke engine goes through four stages, or two complete revolutions, to complete one power stroke. A 2-stroke engine goes through 2 stages, or one complete revolution, to complete one power stroke.

What is the difference between a Two Stroke and a Four stroke engine?

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