The 2009 Audi TT has 16 valves.
The 2009 Audi TTS is a gas-powered vehicle.
The 2009 Audi TTS has an inline 4 engine.
The 2009 Audi A8 has a V8 engine.
The 2009 Audi A6 has 24 valves.
The 2009 Audi A5 has 24 valves.
The 2009 Audi R8 has a V8 engine.
The 2009 Audi S5 has a V8 engine.
The 2009 Audi S4 has 40 valves.
The 2009 Audi S8 has a V10 engine.
The 2009 Audi S6 has 40 valves.
The 2009 Audi A3 has 16 valves.