Motor Trend Head2Head: 2017 911 Turbo Cabriolet vs. Audi R8 V10 Spyder George Achorn, September 20, 2017September 22, 2017, Review Videos, 911, 911 Turbo Cabriolet, 991.2 Turbo Cabriolet, Audi, Head2Head, Johnny Lieberman, Motor Trend, R8, R8 Spyder, Randy Post, 0