BHP to MPG ratio

[Kenobi]

Is there any kind of ratio to bhp.

Ie if you have for example a 200bhp car and then up that to 300bhp. I expect that to reduce the mpg for that vehicle but for random different vehicles would two sperate cars running 300bhp run similar bhp?

[dangerous dave]

Wouldn't really work, my 5 had bugger all power and does poor mph, I know people on here getting better mpg with bigger turbos and more power.

[Tony Walker]

Depends how often you decide to use the 300hp :D once a week or once a day?