I think there is an error in the 0-100 times, the Audi should do 5,5 sec not 4,9 sec.
@Anonymous:
The SRT-8 accelerates much faster on the highway then most sportscars and you can take your whole family+luggage with you (try that in a sportscar!). So most sportscars are absolutely meaningless and unusefull compared to the SRT-8.