This is a question that is very vague to answer, and it also a question that doesnt really matter. According to some stuff that ive read, the power at the wheels is 80 - 85% what it is at the engine. Still this is just an estimate, and like I said, who really cares ...
Oh, in case you dont know the kw - bhp conversion .. its x 1.341 ... so if you have 245 kW at the wheels, you have about 328 rwhp. Not that that really matters either .. its just a measurement and i rekon ppl often quote it just cause its a bigger number and sounds better ... but not always.