Audi only built 666 units (strange number, no?) for their Audi R8 GT Coupe and Spyder versions, so the chance of seeing one on the street is pretty rare. The chance of seeing a parade of them is even slimmer, if not impossible. Then again, if you went to the Nurburgring 24 Hours race where Audi pushed its way to incredible results, you would have seen this aforementioned parade before the race even took place. Talk about some positive energy fueling the racers! As a reminder, both versions are powered by the same 5.2 liter V10 engine that delivers a total of 560 HP and 398 lbs-ft of torque. The R8 GT Spyder will sprint from 0 to 60 mph in 3.8 seconds, while the R8 GT Coupe makes the sprint in 3.6 seconds. Top speeds are 196.97 mph and 198.8 mph, respectively.