The Beastly Mercedes-AMG GT R Has 577 Horsepower And Is Headed To Goodwood

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The wait was definitely worth it.

The Mercedes-AMG GT R was one of the cars we were most looking forward to seeing at Goodwood and we're excited to say that it has just broken cover. We have known for a while now that the GT R was in development and have even seen it in the wild, but Mercedes has just released a ton of photos and info about its newest model. For starters, the GT R is wearing "AMG Green Hell Magno" paint, the name inspired by all the time the car spent in development at the Nurburgring, aka The Green Hell.

This paint is exclusive to the GT R, which may not actually be a bad thing. Questionable paint choices aside the AMG GT R is almost an entirely new car when compared to the GT S. The top-tier AMG GT has the same twin-turbocharged 4.0-liter V8 but it has been reworked to make 577 horsepower and 516 lb-ft of torque. That's up substantially from the standard output of 503 horsepower and 479 lb-ft of torque offered in the GT S and miles ahead of the base model GT's (which will soon hit the US) 456 hp and 443 lb-ft of torque. While the engine is ostensibly the same the aforementioned "reworking" was quite extensive. The overhaul included new turbos, an engine remapping, modified exhaust ports and a modified compression ratio.

The new turbos offer more boost, with a jump from 17.4 psi to 19.6 psi. Power is distributed to the rear wheels via a seven-speed dual-clutch. The transmission was modified as well, with first gear getting a longer ratio and seventh gear and the final drive getting shorter ratios. Whereas the AMG GT S has an aluminum torque tube delivering power from the engine to the transaxle the GT R uses a carbon fiber unit. This bit weighs 30.6 pounds and is around 40% lighter than its aluminum counterpart. All told the AMG GT R can sprint from 0-60 mph in 3.5 seconds and onto a top speed of 198 mph. While the AMG GT R will be plenty fast the goal of any track car is to stay firmly planted to the ground at speed.

Mercedes says that at top speed the GT R makes 342 pounds of downforce more than the standard AMG GT. Aiding in this effort are of course the carbon fiber rear wing and diffuser, but there's also a hidden bit up front that helps drivers corner at high speeds. When in Race mode and at speeds over 50 mph this active aero piece (weighing just 4.4 pounds) mounted in front of the engine deploys, dropping 1.6 inches to alter airflow. This creates what is known as the Venturi effect which sucks the AMG GT R to the track. Additionally the car is equipped with rear-wheel steering, with the back wheels turning in opposite the front at speeds under 62 mph.

This effectively shortens the wheelbase and makes turning through bends and slaloms easier. At speeds over 62 mph the rear wheels stay in the same direction as the front. Should you not care about cornering you can turn off ESP and set the new AMG Traction Control to 9. The system lets drivers modify slip on the rear axle, with level 1 being used for wet conditions where safety is prioritized and level 9 giving the opportunity to execute sweet Jeremy Clarkson-esque drifts. OK, we know that was a lot of info but this is a lot of car. We'll have more info and live shots from Goodwood, but for now enjoy this carbon fiber-clad monster in all its Green Hell Magno glory.

Update: Mercedes-Benz has dropped a video of the AMG GT R tearing up the track.


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