BHP = Base Horse Power, measured at the fly wheel.
WHP = Wheel HP, you lose about 10%-25% hp thru the drive train with a RWD car.

Drive types:
1. Front engine, Front drive (FF or FWD)
2. Mid engine, Rear drive (MR)
3. Front engine, Rear drive (FR or RWD)
4. Front engine, All wheel drive (AWD or 4x4)
5. Rear Engine, Rear Drive (RR, ?only for Go-Karts?)

I don't believe there are any Mid Engine, AWD cars. I could be wrong.