The 2008 Audi S4 has a drag coefficient of 0.33 Cd.
The 2006 Audi S4 has a drag coefficient of 0.30 Cd.
The 2004 Audi S4 has a drag coefficient of .30 Cd.
The 2009 Audi S4 has a drag coefficient of 0.31 Cd.
The 2002 Audi S4 has a drag coefficient of .31 Cd.
The 2007 Audi S4 has a drag coefficient of 0.33 Cd.
The 2013 Audi S4 has a drag coefficient of 0.30 Cd.
The 2011 Audi S4 has a drag coefficient of 0.28 Cd.
The 2012 Audi S4 has a drag coefficient of 0.29 Cd.
The 2014 Audi S4 has a drag coefficient of 0.30 Cd.
The 2005 Audi S4 has 40 valves.
The 2005 Audi S4 has a V8 engine.