Panamera Turbo vs. Panamera S vs. Carrera 4S vs. E63 AMG vs. S8
 

I found this awesome comparo of these 5 cars at Tskuba. Even though I can't understand the Japanese commentary, I can understand their emotion, and laughed at some parts.

Panamera Turbo vs. Carrera 4S vs. E63 AMG vs. Audi S8 vs. Panamera S (HQ) - YouTube

And here's one with the E63 and Turbo on what looks to be Motegi.

http://www.youtube.com/watch?v=ytYIQ...eature=related

Love these videos. It really gives you a good perspective on the relative performance of various cars. The fact that the turbo is slightly faster than the 4S is truly physics bending.