road load horsepower

road load horsepower
The amount of power at the driving wheels needed to move a vehicle down the road at a steady speed. This power varies according to the vehicle's speed, aerodynamic drag, mechanical friction, and 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.

Dictionary of automotive terms. 2015.

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