How to Calculate Horsepower?

[HopeAnn]

Horsepower in cars refers to the unit of engine power, generally indicating metric horsepower rather than imperial horsepower. Power is calculated from torque: The calculation formula: Power (W) = 2π× Torque (N-m) × Speed (rpm) / 60. After simplification, it becomes: Power (kW) = Torque (N-m) × Speed (rpm) / 9549 From this, the car's horsepower is calculated. Additional Information: Horsepower equals torque multiplied by speed, symbolizing how much air-fuel mixture the engine can intake per unit time. When the throttle is increased and the engine speed gradually rises to the maximum torque point, although the intake volume has peaked, the speed continues to increase, meaning the number of intakes also increases, so horsepower can still rise until it reaches the maximum horsepower point. Of course, the performance of a car cannot be judged solely by horsepower and torque; it also depends on the matching of the transmission, tires, and body design. Only by considering all these factors together can the performance of a car be evaluated.