Both rely on the Mercedes-AMG M177 twin-turbo V8, a hand-built engine that barely differs from the first generation's M178. The main difference is the wet-sump lubrication for the M177 as opposed ...

The new GT 55 4MATIC+ features a 4.0L V8 bi-turbo (M177) built under AMG’s One Man, One Engine philosophy, producing 476 hp and 526 lb-ft (71.4 kg·m) torque, paired with a Speedshift MCT 9 ...

Two versions will be offered, badged 55 and 63, just like the SL, and using the same 469 hp (476 PS) and 577 hp (585 PS) versions of the M177 4.0-liter twin-turbo V8, giving 516 lb-ft (700 Nm) and ...

It runs on a 4.0L V8 bi-turbo engine with a 9-speed AMG SPEEDSHIFT MCT, delivering 476 hp and 71.4 kg·m torque. Standard AMG Performance 4MATIC+ ensures power and daily drivability.

All together, the GT 63 is good for zero-to-60 mph in 3.1 seconds and a top speed of 196 mph—limited electronically. For the GT 55, the figures work out to 3.8 seconds and 183 mph.

Mercedes-AMG will release the new AMG GT Coupe next year. It comes in two models, both powered by 4.0-liter twin-turbos sending torque to all four wheels, as necessary: The GT 63 with 577 hp, and ...

Power comes from a retuned version of AMG’s familiar 4.0-liter twin-turbo V-8, now making peaks of 603 hp and 627 lb-ft of torque — increases of 26 hp and 37 lb-ft over the GT 63.

Top speed is 196 or 183 mph, in the AMG GT 63 and AMG GT 55, respectively. A peek under the hood of the Mercedes-AMG GT Coupe reveals its twin-turbo V8 power plant. Mercedes-Benz ...