• Mercedes AMG GT R Roadster

Mercedes-AMG Reveals the GT R Roadster

Act quickly if you’re interested

Matthew Guy By: Matthew Guy March 6, 2019

If you’ve been thinking the AMG GT family now has more members than the Brady Bunch, well, you’re not too far off. With this latest addition, the brood has grown to no fewer than sixteen different models … but when each and every one is capable of physics-bending acceleration, we’re okay with AMG’s decision to make several trips to the Affalterbach’s cloning vats.

The new AMG GT R Roadster now sits atop the model portfolio of open-top cars. Underneath its massive hood, the company has installed a 4.0L biturbo V8 tuned to produce 585 horsepower and over 500lb.-ft of tire-frying torque. All that twist is available from 2100rpm all the way up to 5500rpm, meaning that drivers will experience right now acceleration just about any time they drop their right foot. The run to 100km/h is yours in just 3.6 seconds through a seven-speed dual-clutch transmission.

Active aero does its part on the car’s underbody to keep this grin-inducing convertible stuck to the tarmac. Weighing around two kilograms, this light carbon-fibre element is speed-sensitive and automatically extends 40 millimetres downwards to produce a considerable change in airflow. This results in a Venturi effect, effectively sucking the car onto the pavement and reducing front-axle lift by 40 kilos at 250 km/h. The addenda automatically retracts depending on speed and what driving mode the pilot has selected.

AMG’s new GT R Roadster has been doing squats at the gym, as it is 57 millimetres wider at the rear than the GT and GT S Roadsters. This creates room for 20-inch wheels and tires, 275/35 in the front and a massive 325/30 in the rear, plus a wider track measurement between the rear tires. This makes for improved traction while allowing higher cornering speeds. It looks baller, too.

Mercedes AMG GT R Roadster

Mercedes AMG GT R Roadster

Face-altering directional changes will be possible thanks to AMG’s standard active rear-wheel steering, a system which deploys two steering actuators in place of conventional control arms on the rear axle. This “by-wire” system adjusts the rear wheels within a predefined operating map by means of electronic control, providing a maximum track angle change on the rear wheels of 1.5 degrees. Up to a speed of 100 km/h, its rear wheels point in the opposite direction to the front wheels, virtually shortening the wheelbase. Beyond that speed, the system turns the rear hoops in the same direction as the front wheels, corresponding to a virtual lengthening of the wheelbase which improves handling stability.

A bevy of gee-whiz drive settings – ranging from ‘slippery’ to ‘race’ – change up throttle and transmission mapping while adjusting the active aero and levels of blat emanating from the titanium exhaust system. A carbon brace in the car’s centre tunnel keeps things more rigid than your grandfather’s political views.

All this is in addition to the expected sumptuous interior that is an AMG hallmark. Act quickly if you’re interested: they’re only building 750 of them.