Developed as a successor to the 4.2 TDI, the 4.0 TDI with eight cylinders, two turbochargers, electric compressor, and 48-volt electrical system is impressive by all accounts. In the Audi SQ7, maximum ...
The Audi RS7 Sportback is one of the most dramatic-looking big fastbacks ever made, and what powers it is equally special. Hiding under the RS7's long hood is a 4-liter twin-turbo V8 engine, found in ...
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