Cars & Vehicles
Chevy Cavalier Z24
Formula One

What is meant by brake horse power in cars?

User Avatar
Wiki User
2006-08-31 17:47:26

Brake horsepower (bhp) is the measure of an engine's horsepower

without the loss in power caused by the gearbox, generator,

differential, water pump and other auxiliaries. Thus the prefix

"brake" refers to where the power is measured: at the engine's

output shaft, as on an engine dynamometer. The actual horsepower

delivered to the driving wheels is less. An engine would have to be

retested to obtain a rating in another system. The term "brake"

refers to the use of a band brake to measure torque during the test

(which is multiplied by the engine speed in revs/sec and the

circumference of the band to give the power).

Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.