Mercedes-AMG GT will offer both a GT Roadster and a quicker GT C Roadster variant for 2017. They each share the twin-turbocharged 4.0-liter V8 of their fixed-top brethren, but with different outputs. The standard GT Roadster makes 469 horsepower and 465 pound-feet of torque while the GT C Roadster makes 550 horsepower and 502 lb-ft of torque. 0-60 mph times of 3.9 and 3.7 seconds, respectively, match the normal GT and GT S coupes despite both hardtops having less power. That's likely a result of the drop-tops weighing more.