for all practical purposes, 1 PS is equal to 1 HP... sobrang liit lang ng difference

manufacturers measure horsepower at the crankshaft of the engine. however, keep in mind that there are losses incurred as the power is transmitted through the transmission and drivetrain (the drivetrain, with its numerous parts, is not 100% efficient). thus, power at the wheels ("wheel horsepower") will always be lower than the published crankshaft HP. keep in mind also, that ultimately, it is wheel horsepower that matters since it is the measure of how much power is actually making it to the ground.

the drivetrain losses total about 15%-25%... thus, a 160 hp Civic SiR is actually putting only about 130-140 hp to the front wheels