BMEP is the actual average pressure that pushes on the pistons. The higher the number, the more optimized the engine is. It is mesured in bars... Of course, turbo engines will have a higher BMEP. 1 bar = 14.5psi. In 2006, according to this website, an F1 car had a BMEP of about 14.63. A Nextel cup car, 15.1.

Rabbit, I don't know how you did your math, the equation is (kW x 1200) divided by (L x rpm). Therefore the Hayabusa engine gets a BMEP of 14.1. Very good for a N/A motor.

Of course the BMEP is not the whole story, but it allows us to compare engines, even though the power, number of cylinders and displacement are different.