Type of engine and difference between two stock and four stock engine petrol engine and engine working

Question

Accepted Answer

Two types of petrol engines are two-stroke and four-stroke engines. They differ in their working cycle and efficiency.

Two-stroke engines complete a power cycle in one revolution of the crankshaft, while four-stroke engines complete it in two revolutions.
Two-stroke engines have a simpler design and are lighter, but they are less fuel-efficient and produce more emissions.
Four-stroke engines are more complex but more efficient and produce fewer emissions.
Examples of two-stroke engines include chainsaws and dirt bikes, while examples of four-stroke engines include cars and lawnmowers.