The main 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 difference between two-stroke and four-stroke engine cycle also lies in the rotation of the crankshaft.
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As far as efficiency goes, the 4-stroke certainly wins. This is due to the fact that fuel is consumed once every 4 strokes.
Four-stroke engines are heavier; they weigh upwards of 50% more than a comparable 2stroke engine.
Typically, a 2-stroke engine creates more torque at a higher RPM, while a 4-stroke engine creates a higher torque at a lower RPM.
The 4-stroke engine is also much quieter, a 2-stoke engine is significantly louder and has a distinctive, high-pitched “buzzing” sound.
Because 2-stroke engines are designed to run at a higher RPM, they also tend to wear out faster; a 4-stroke engine is generally more durable. That being said, 2-stroke engines are more powerful.
Two-stroke engines are a much simpler design, making them easier to fix.
They do not have valves, but rather ports. Four-stroke engines have more parts, therefore they are more expensive and repairs cost more.
Two-stroke engines require pre-mixing of oil and fuel, while the 4-strokes do not.
Four-strokes are more environmentally friendly; in a 2-stroke engine, burnt oil is also released into the air with the exhaust.
#TwoStrokeEngine #FourStrokeEngine
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