That's when the legendary Walter Röhrl drove the 600-horsepower Audi Sport Quattro S1 up the mountain in a blistering 10:48. Sure, others have done it quicker since, but they've done it on ...

Every gearhead should know about the Audi Sport Quattro S1. It was a Group B World Rally Championship legend back in the early '80s, along with other incredible competitors like the Ford RS200 ...

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the Quattro Concept of 2010 (shown above) and the Sport Quattro Concept revealed at the 2013 Frankfurt Motor Show. In between them, there have been numerous rumors about what, if any, kind of ...

The Audi Quattro S1 was a 480 hp rally weapon. So a rally champion built a 650 hp Nissan Skyline 4WD to beat the Audi. This is the Super Skyline story ...

With four-wheel drive and a huge slug of torque – 273lb ft between 1600 and 3000rpm – the S1 is very rapid off the line. It’ll reach 62mph in an impressive 5.8 seconds, which is quicker than ...