2019 AMG GT R Roadster spied

A drop-top take on the hottest Mercedes-AMG, the GT R, has been spied during development testing. The AMG GT R Roadster will sit alongside its Nurburgring-conquering coupe sibling, with power from a twin-turbo 4.0-litre V8 making 430kW and 700Nm, sent exclusively to the rear wheels. That should be good for a 100km/h sprint time of around 3.6 seconds, and a top speed in excess of 300km/h. In other words, fast enough to make your hair stand on end.