Does the motor in the 81 - 83 5000 turbo have the same performance "potential" as the UR-Q. I know the UR-Q has much higher boost from the factory in the US but aren't the ingines basically the same? Todd Phenneger aka: Zarati 1984 4000s quattro / New Red Paint 2.5" Borla SS Exhaust / Boge Turbo Gas Shocks 15" Wheels & 205/50 ZR15 Bridgestone RE-71s Considering a Turbo Conversion :)