The 2014 Audi TTS has an inline 4 engine.
The 2015 Audi TT has an inline 4 engine.
The 2011 Audi TT has an inline 4 engine.
The 2013 Audi TT has an inline 4 engine.
The 2010 Audi TTS has an inline 4 engine.
The 2012 Audi TTS has an inline 4 engine.
The 2009 Audi TTS has an inline 4 engine.
The 2010 Audi A8 has a V8 engine.
The 2004 Audi S4 has a V8 engine.
The 2013 Audi A8 has a V6 engine.
The 2005 Audi A8 has a V8 engine.
The 2009 Audi S4 has a V8 engine.