The shockingly green Mercedes AMG GT R is a track monster

What has 577 horsepower, 516 pound-feet of torque, and is bright green? The Mercedes AMG GT R, of course. It's at the top of Mercedes' street-legal sports car range and, fresh off its unveiling on Friday, the car has arrived at the Goodwood Festival of Speed to take on the famous hill climb.It's the harder, better, faster, stronger version of the Mercedes-Benz's excellent AMG GT that was released a few years ago. It'll get from 0-60 mph in 3.5 seconds, up to a top speed of 198 mph. We