Here's What Makes Audi's Quattro All-Wheel-Drive System So Great

With Audi Sport Quattros now routinely costing half a million or more, and even replicas now going for 6 figure sums, they're more likely to be collectors items and museum pieces than being beasted hard on track and doing donuts in a car park, but thankfully things weren't always this way! Go back a good couple of decades and tuning legend Hans Dahlback of Dahlback Racing was accidentally inventing the concept of viral car videos with clips of him going wild on the street in his own 550bhp Sport

From the Ur-quattro to the e-tron S: The legendary quattro celebrates its 40th anniversary