Hi could anyone tell me what is the really difference between diffrent a8 and s8 engines is there different heads,cams, software?
So will the s8 heads cam and software fit to a8 4.2l abz motor?
What about the difference between 340hp vs 360hp s8 v8??
Thank you and excuse my english.

 

There was just a post about this in the a6 forum. One of the things they mentioned was cams which is where most of the power difference cam from.