hp vs bhp vs whp

[Thewhite]

Can someone explain me what is the difference between hp, brake hp and wheel hp? or in which context one should be used instead of the other?

[Old Tele man]

BHP is Brake Horsepower, which is typically measured at the wheel(s), but is sometimes mistakenly referring to Flywheel HorsePower, engines' power with all accessories (alternator, water pump, a/c idler, etc.) attached.WHP is Wheel Horsepower, which is definitely measured at the wheel(s); also called 'effective' horsepower....it's all about *where & how* the power is being measured.SAE J1349 HP is the newest "standard"...which is a guaranteed "useable" HP.

[vibedrivermatt]

this must be a question that wikipedia can answer! wiki to the rescue!