The Honda GP bike back in the 90s was a 499cc, Liquid-cooled two-stroke V four that produced 200 bhp in race condition, in bench testing the engine was capable of producing 300+ bhp ! but would have been totally unrideable as the power band was so small. As it was there was only a very few riders that could come to terms with it as some found out to their cost as the throttle was like an on/off switch !
That sort of power plant equates to 400bhp per litre for a conventional non forced induction engine ! What a pity they outlawed those engines as it would have been "interesting" to see a 1000cc 2 stroke GP bike on the circuits, what with modern injection and ignition controlled by computer it would be something worth watching