Yes, beyond the GT R's 577 hp.
Mercedes-AMG is currently hard at work developing its second-generation GT, which should arrive sometime in 2021 if all goes to plan. The current GT dates back to 2015 and given that its most direct rival, the Porsche 911, has just been redesigned, the folks at AMG's Affalterbach headquarters need to respond in kind. As we previously reported, the next Mercedes-AMG GT is slated to make greater use of hybrid technology although it'll still retain a V8 engine. Autocar now has some more specific updates about this new powertrain setup and what we can expect regarding maximum output.
The next GT will retain the twin-turbocharged 4.0-liter V8 although it will receive some necessary updates. More importantly, however, it'll be connected to a new mild-hybrid system. Its transaxle will also be re-engineered in order to handle a variable all-wheel drive system for some variants, specifically the most powerful one. The ultimate goal is to achieve greater power and performance than the current car, and the electric boost is key to that.
Therefore, expect top-end GTs to produce somewhere in the neighborhood of 650 horsepower, perhaps more. At the moment, the AMG GT R offers 577 hp. Another benefit of an electric boost, thanks to a new 48V electric architecture, is a significant increase in torque. Put it like this: today's GT R has a maximum of 516 lb-ft while its successor is expected to generate upwards of 700 lb-ft.
For now, AMG's most powerful model is the GT63 S 4Matic 4-Door Coupe, which offers 630 hp and 664 lb-ft thanks to electric boost functions. The next GT supercar will top those figures. Another interesting development is that AMG has ruled out all-electric capability for specific distances, something Porsche is currently working on with its future plug-in hybrids. Future AMG vehicles won't offer this due to packaging concerns.
Lastly, Mercedes-AMG still intends to add an AWD drive system to the GT. This will make it capable of rapidly balancing drive between the front and rear axles as well as a torque vectoring function that varies the amount of power sent to each rear wheel. It will also receive a drift function that sends power directly to the rear wheels, just like with the current E63.
AMG engineers have also managed to reduce the car's weight thanks to a number of changes, among them a revised aluminum spaceframe that weighs around 500 pounds less than the one used in today's car. No specific launch date is available just yet, but the 2021 Mercedes-AMG GT could make its first appearance in about a year's time.