630BHP-18%(Drivetrain loss for AWD)=520awhp @ 3300lbs aka Viper SRT-10 loses. I raced a 996 TT with 500awhp/565awtrq @ 3050lbs. Got him by 1 1/2 cars at 160! Just stating some numbers and facts.
If you want to see the car here's the link:
USP Motorsports - VW Audi Porsche Performance Upgrades