The Top Gear crew takes a BMW M6 (507hp), Aston Martin V8 Vantage (380hp), and Porsche Carrera 911 (325 hp) up to Mountain Road (Isle of Man) for some “against the clock testing.” You may be surprised at which car wins the challenge. Video after the jump.

The Top Gear crew takes a BMW M6 (507hp), Aston Martin V8 Vantage (380hp), and Porsche Carrera 911 (325 hp) up to Mountain Road (Isle of Man) for some “against the clock testing.” You may be surprised at which car wins the challenge. Video after the jump.