The 2015 Audi TTS has double overhead cam (DOHC).
The 2013 Audi TTS has double overhead cam (DOHC).
The 2012 Audi TTS has double overhead cam (DOHC).
The 2011 Audi TTS has double overhead cam (DOHC).
The 2010 Audi TTS has double overhead cam (DOHC).
The 2009 Audi TTS has double overhead cam (DOHC).
The 2014 Audi S6 has double overhead cam (DOHC).
The 2014 Audi R8 has double overhead cam (DOHC).
The 2014 Audi A5 has double overhead cam (DOHC).
The 2014 Audi A7 has double overhead cam (DOHC).
The 2014 Audi S7 has double overhead cam (DOHC).
The 2014 Audi S5 has double overhead cam (DOHC).