Compare 2-stroke and 4 – stroke engine
S. N.
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Four Stroke Engine
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Two Stroke Engine
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1 |
One working stroke for every two revolutions of the crankshaft.
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One working stroke for each revolutions of the crankshaft
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2 |
Turning moment on the crankshaft is not even due to one working stroke for every two revolutions of the crankshaft. Hence heavy flywheel is required and engine runs unbalanced
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Turning moment on the crankshaft is more even due to working stroke for each revolution of the crankshaft .hence lighter flywheel is required and engine runs balanced.
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3 |
Engine is heavy
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Engine is Light
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4 |
Engine design is complicated
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Engine design is Simple
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5 |
More Cost
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Less Cost
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6 |
Less mechanical efficiency due to more friction on many parts.
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More mechanical efficiency due to less friction on few parts.
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7 |
More output due to full fresh charge intake and full burnt gases exhaust
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Less output due to mixing of fresh charge with burnt gases.
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8 |
Engine runs cooler
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Engine runs hotter.
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9 |
Engine is water/air cooled
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Engine is air cooled
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10 |
Engine requires more space.
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Engine requires less space.
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