Originally Posted by hotrod2448
OK, so Alpina rates their stuff at crank power like OEM. I'm used to pretty much discussing only WHP. There's were I went wrong.
Do most BMW tuners rate power using crank power? It seems that is mostly a Euro thing. If I recall a lot of the Audi guys do it that way as well.
To me, crank numbers are worthless, and can be misleading. The E46 M3 and 335i put down fairly comparable rwhp numbers, yet their crank rating is 33hp different.
Lots of tuners quote a crank figure based off estimates. Good for marketing, but doesn't really give you a clear picture of power being made. I'd be real curious what the N54 puts at crank, stock. Probably more than 300/300. That makes Alpina's gains less impressive, particularly if they are using 16 psi boost.