2013 Audi S6 Commercial: 3.7 Seconds
12 Sep 2012, 09:01 UTC · By: Mihnea Radu / The new Audi S6 is by no means the most powerful car that they’ve ever built, but with 420 hp coming from a new 4.0-liter twin-turbo V8 it’s not exactly slow, and 550 Nm (405 lb-ft) of t...