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It all depends on what vehicle you are referring to.

The CC indicates the volume of gas (V) swept by the piston in the combustion chamber during each powerstroke. To know the brake power, whose unit is horsepower, (BP), you must also know the frictional power (FP), engine rpm (N) and combustion chamber mean effective presure (P).

BP = P x V x N / (60n) - FP
where n = 2 for 4 stroke engines (as one power stroke per 2 revolutions of the engine), 1 for 2 stroke engines
[All except N are in SI units]

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9y ago

What else can I help you with?