This can be done more easily by changing the difficulty to Easy, as the game will turn off traction control and damage wear as well as enable assisted braking on turns and steering for easier drifts. To unlock the M12 Warthog FAV vehicle from the Halo series in Autovista mode (non drive-able), you must unlock all 20 other cars in Autovista mode by completing their challenges in that mode, ranging from completing races and passing a certain number of cars within a lap or two.
Successfully complete nine challenges in Autovista mode to unlock the 1931 Bentley 8 Liter.
