The 2009 Audi A4 has a drag coefficient of 0.28 Cd.
The 2012 Audi A4 has a drag coefficient of 0.28 Cd.
The 2007 Audi A4 has a drag coefficient of 0.33 Cd.
The 2004 Audi A4 has a drag coefficient of .30 Cd.
The 2013 Audi A4 has a drag coefficient of 0.31 Cd.
The 2008 Audi A4 has a drag coefficient of 0.33 Cd.
The 2005 Audi A4 has a drag coefficient of .30 Cd.
The 2006 Audi A4 has a drag coefficient of 0.33 Cd.
The 2002 Audi A4 has a drag coefficient of .30 Cd.
The 2011 Audi A4 has a drag coefficient of 0.28 Cd.
The 2003 Audi A4 has a drag coefficient of .30 Cd.
The 2014 Audi A4 has a drag coefficient of 0.31 Cd.