Without any forced induction the S85 V10 in the E60 M5 on paper is at a disadvantage. That said, the S85 continues to show its well known top end strength giving the new twin turbo V8 Benz a run for its money. Of course AMG fans will be quick to point out a tune on the E63 would put it far ahead of the M5 and the S version of the E63 would have done better. This is absolutely correct but it is no surprise a forced induction car can see large aftermarket gains.
What is surprising is that an almost decade old smaller naturally aspirated V10 can run with and even pull a brand new and larger twin turbo V8. Just another set of videos that makes BimmerBoost miss the awesomeness that is the BMW S85 V10.