DirtyVegasTT

I knew it would too after getting my 4.0T tuned. Every car (sedan) I test drive now feels slow / slower. Ms and AMGs are just not there, not even the (current) Panamera Turbo. The only way to go now is to look for a car with higher modding potential which pretty much leaves me with a choice of an S8 or RS7 which still feel slower stock but will be faster after a tune. But those 2 cars are so similar to what I have (interior/tech) that it does not make sense to move up. My neighbor is complaining about the same thing for his S8. First world problems I guess...

Jack88

I'm having that problem as well. I've test driven 2 S8's, and both felt the same or a bit slower than my current tuned CL. Still, I like the feel of the Audi much better and I know that a tuned S8 will still walk away from the 12 pot Benz, and an A8 4.0t with a tune will come close.

DirtyVegasTT

There's the E63 and CLS63, but even tuned those guys admit to RS7 having an edge.