Watch this 709HP Audi S2 with a massive turbo unleash its full power on the no-speed-limit Autobahn! Experience mind-blowing ...

Double the cylinders, exponentially more fun. This is what happens when a supercar engine is mated to old-school quattro.

Gone is the stock turbocharged 2.2-liter five-cylinder engine it left the factory with 30 years ago. In its place is the same V10 powertrain from the R8.

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It started out as two rare Audis and became one, an Audi S2 coupe with double the number of cylinders thanks to the V10 from an Audi R8. Audi is a German automaker that produces a range of luxury ...