This question already has an answer here:
I know that BHP is the measure of power of an engine. I realised that I have no idea how the number (for example 540 BHP) relates to the engine itself.
Does 1 HP mean one rotation of the crankshaft per a given time? Or is there some other way of defining it?
How do you define BHP?
Also, what is the difference between HP and BHP?