The 2002 Audi A6 has a 3.0 L base engine size.
The 2004 Audi A6 has a V6 engine.
The 2010 Audi A6 has a V6 engine.
The 2006 Audi A6 has a V6 engine.
The 2008 Audi A6 has a V6 engine.
The 2003 Audi A6 has a V6 engine.
The 2007 Audi A6 has a V6 engine.
The 2009 Audi A6 has a V6 engine.
The 2005 Audi A6 has a V6 engine.
The 2001 Audi A6 has a V6 engine.
The 2011 Audi A6 has a V6 engine.
The 2013 Audi A6 has an inline 4 engine.