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Audi S4: Underrated?

Audi S4
Street word has it that the Audi S4 might be more powerful than everybody thought. It’s an awesome ride, that’s for sure!

And guess what? Looks like Audi is pulling the same trick with their new supercharged S4. Volkswagen and Audi tuner APR stuck a 2010 Audi S4 on an AWD-dyno and discovered the following. Instead of the 333 hp and 325 torques Audi is claiming, they pulled 331 hp and 336 pound-feet of torque… at the wheels! Figuring that AWD cars have about a 20% parasitic drivetrain power loss, the actual crank output of the S4 is huge. How huge? By our calculations just about 400 horsepower/torques.

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Source: Autoblog