absent

Acceleration in the video below is not possible based on weight and official 605 HP, most likely the car is similarly underrated as the regular S8 that was dynoed by MT at about 55Hp higher then factory number.
It really destroys the S63.
I'm dropping my E63S at dealer today to remove Laser jammer and radar detector (Max) to install in S8 that just came in.
Pics later this week.

UnseenS8

I took my S8 to dyno last Saturday and it came with 541PS, so only 21PS extra from official spec.

NYLawyer

Looks like a keeper. Ordered mine last week.

absent

What was the HP at the wheels?
How did you figure 541HP?, what basis for AWD loss did you use?
In most cases, RWD cars lose about 15% of crank power on driveline losses, AWD about 20% and if I remember correctly, that figure was used by MT Dyno test.

UnseenS8

Here's the chart: http://lh3.googleusercontent.com/-it...8_standard.jpg

MP4.2+6.0

An interesting post I came across from someone with a "standard" A8 or S7 4.2 was one where they just used VCDS to read the measuring blocks in recorded mode and pull off the engine torque and RPM. Then he just ran it through the standard torque-HP conversion formula to back into HP. Pesto, VCDS dyno end around, measuring on motor side instead of from wheel end with a correction factor. Haven't tried it, but I liked the idea.