Audi has built some exemplary sports cars over the years but none have come close to the performance of their halo car, the R8. With a monstrous V-10 and Quattro all-wheel-drive, our hosts rip up some back roads to determine just how capable this latest flagship really is. Also in this episode is a look at McLaren's "entry level" sports car, the 570S. Can this British-based company meet other sports car manufacturers toe-to-toe? Our hosts head to some fantastic mountain roads to make that determination.