There is a very slight difference between these terms; the ‘Brake Horsepower’ (BHP) considers power loss due to friction while the ‘HP’ does not. It means the BHP is slightly less than the HP because it is calculated after the mill feds to the working parts like a turbocharger, water pump/ alternator, gearbox, and drivetrain. The auto companies calculate BHP by forcing the engine to full revs and then allowing to decelerate it to a dead end.