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i have calculated an engine power of a prototype car by calculating the power losses against road gradients, air drag and rolling resistance. i have calculated these losses for max. car speed,lets say 50 kmph. what i need to know is do i need to consider acceleration allowance even when i have calculated the power of an engine for max. speed??if yes, then why calculating acceleration allowance for an engine when car cannot accelerate beyond 50 kmph as all my calculations are based on maximum speed.

pleasez do reply, I am confused...