Road-Load Horsepower, Glossary and Terms, Automotive, Motorcycle, Boat Dealers

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"Road-Load Horsepower"

The amount of power at the driving wheels needed to move a car down the road at a steady speed. This power varies according to the car's speed, aerodynamic drag, and mechanical friction, as well as the tires' rolling resistance. Road-load horsepower is distinct from engine power because the output of the engine is sapped by various mechanical losses between the engine's output at its flywheel and the driving wheels.

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