Audi Pioneers Electric Turbo Technology
Now there is a solution to dreaded lag which accompanies turbochargers at low rpm, and it’s one you’d be surprised hasn’t been tried earlier. The primary hurdle when it comes to turbocharging over supercharging has been the lag encountered at lower engine outputs. One solution to this has been to use a twin turbo setup,

Replacing Timing Belts on VW and Audi 4.2L 8-cylinder Engines
Many timing belts have different change intervals even in the same car line. The change intervals can be different not only because of engine size, but also due to model year. The following are helpful tips for timing belt replacement on the VW and Audi 4.2L 8-cylinder engines. Many timing belts have different change intervals
