The 2009 Audi A4 has a 2.0 L base engine size.
The 2002 Audi A4 has an inline 4 engine.
The 2004 Audi A4 has an inline 4 engine.
The 2010 Audi A4 has an inline 4 engine.
The 2008 Audi A4 has an inline 4 engine.
The 2014 Audi A4 has an inline 4 engine.
The 2005 Audi A4 has an inline 4 engine.
The 2003 Audi A4 has an inline 4 engine.
The 2001 Audi A4 has an inline 4 engine.
The 2007 Audi A4 has an inline 4 engine.
The 2013 Audi A4 has an inline 4 engine.
The 2006 Audi A4 has an inline 4 engine.