What is different between for 2 stoke engine and four stoke engine?

Question

Accepted Answer

Two-stroke engines have a power stroke every revolution, while four-stroke engines have a power stroke 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 system.
Two-stroke engines are lighter and have a higher power-to-weight ratio than four-stroke engines.
Two-stroke engines produce more pollution due to incomplete combustion, while four-stroke engines are more fuel-efficient and produce less pollution.
Examples of two-stroke engines include chainsaws and dirt bikes, while examples of four-stroke engines include cars and motorcycles.

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