The German Audi Tuning Outfit MTM have just release some Teaser pics of their Cold but impressive looking, V8 Supercharged R8 withe Rear Wheel Drive.
The quatro spec is below but expect this to be slightly off as there will be no transmission loss from the removal of Quattro I expect 570-580 and the torques is up for comment .
Supercharger Conversion Audi R8 560 hp (412 kW) with a torque of 580 Nm; V/max 303 km/h limited; longer gear ratio optionally available for V/max 317 km/h