When it comes to performance cars, horsepower and torque are usually the only figures we take into account when comparing them. That's a logical thing to do, but sometimes these numbers can be deceiving. This new video from CarWow brings together a BMW M5 tuned to an insane 1,000 horsepower and a stock Porsche 911 Turbo S Cabriolet. Can the Porsche keep up with the beefed-up sedan? Is horsepower the decisive factor here? Let's find out.