The 2008 Audi A6 has a 3.1 L base engine size.
The 2008 Audi S8 has a 5.2 L base engine size.
The 2008 Audi R8 has a 4.2 L base engine size.
The 2008 Audi A8 has a 4.2 L base engine size.
The 2008 Audi S5 has a 4.2 L base engine size.
The 2008 Audi S6 has a 5.2 L base engine size.
The 2008 Audi S4 has a 4.2 L base engine size.
The 2008 Audi TT has a 2.0 L base engine size.
The 2008 Audi A5 has a 3.2 L base engine size.
The 2008 Audi Q7 has a 3.6 L base engine size.
The 2008 Audi A4 has a 2.0 L base engine size.
The 2008 Audi S4 has a V8 engine.