Car and Driver Comparison Test of Porsche 911 Turbo Audi R8 and Aston Martin V8 Vantage. Hard to choose between the three: -the Audi R8 is the coolest -the Aston Martin V8 Vantage is the best looking -the Porsche 911 Turbo has the best driving dynamics Being a Porsche fan, I would have to give the nod to the 911 Turbo.