Mercedes-AMG GT 4-Door Coupé

The Mercedes-AMG GT 4-Door Coupé is an executive car (E-segment) introduced in 2018 by Mercedes-AMG. It is marketed as a five-door variant of the AMG GT two-door sports car. Despite the name and style, the GT 4-Door Coupé is closely related to E63 wagon with its performance chassis, and is featured by the AMG-specific rear frame and a different front axle for better kinematics.

Specifications
The design of the GT 4-Door Coupé was mainly influenced by the Mercedes-Benz AMG GT Concept introduced a few years before series production. The AMG GT 4-Door Coupé uses a front-engine layout with rear-wheel-drive or 4MATIC+ fully variable all-wheel-drive (rear-biased), and is available with either a 3.0 L M256 turbo/supercharged inline-six engine or a 4.0 L M177 twin-turbocharged V8 engine. The inline-six engine features a conventional turbocharger as well as a mild hybrid system that Mercedes-Benz calls "EQ Boost", which uses an electrically driven supercharger and a 48 volt electric motor that when combined, produce an extra 21 hp and 184 lbft of torque in addition to the petrol engine when it is not powering the electrical system. This system traces its roots back to the Mercedes CLS 53. The car utilises the rear anti-roll bar to increase chassis stiffness, as well as active aero, including an electronically adjustable rear spoiler and electronically operated front louvers in the front grille, that can open and close to manage airflow through the radiator from the AMG GT R flagship sports car.

Mercedes-AMG GT 43 4MATIC+ & Mercedes-AMG GT 50 4MATIC+
The GT 43 and the GT 50 are the entry-level variants of the AMG GT 4-Door Coupé and both feature the same M256 3.0L Twincharged inline-six and the 4MATIC+ AWD system. The engine produces 270 kW and 500 Nm of torque and the EQ Boost starter-alternator delivers additional short-term output and torque of 16 kW and 250 Nm, respectively. It can accelerate from 0-100 km/h in 4.9 seconds, with a claimed top speed of 270 kph. The GT43 and GT50 are the same car (GT43 is the worldwide version, GT50 is the China only version).

Mercedes-AMG GT 53 4MATIC+
The GT 53 is the more powerful version of the GT 43. It features the same 3.0L turbo/supercharged inline-six, but with higher outputs. The engine produces 320 kW and 520 Nm of torque. The starter-generator and electrically driven supercharger called EQ boost supplements the engine temporarily with 16 kW and 250 Nm of torque while under full acceleration. It can accelerate from 0-100 km/h in 4.5 seconds, along with attaining a top speed of 285 kph as tested by the manufacturer. The suspension uses steel springs and adaptive dampers and the gearbox is a 9-speed unit that uses a conventional torque converter. The GT53 can be optioned with the more aggressive "Aero Package". this package includes a more pronounced front splitter, with larger air vents to allow for more efficient cooling, combined with a deeper and larger rear diffusor and both fixed or movable (electronically) rear wing.

Mercedes-AMG GT 63 4MATIC+
The GT 63 is a high performance, better equipped variant of the GT 4-Door and features the AMG M177 4.0L twin-turbocharged V8 engine, which produces 430 kW and 800 Nm. It has a claimed 0–62 mph acceleration time of 3.4 seconds and a top speed of 193 mph as tested by the manufacturer. The GT 63 also has an optional selectable "Drift Mode" which directs power solely to the rear wheels. The car comes standard with an electronically controlled limited-slip rear differential and rear-wheel steering, and features an MCT gearbox with a wet clutch to handle the extra power. The GT 63 uses AMG's multi-chamber air suspension for a sportier, more adaptive ride and has cylinder deactivation mode for increased efficiency.

Mercedes-AMG GT 63 S 4MATIC+
The GT 63 S features the same 4.0L M177 twin-turbocharged V8 engine as in the GT 63, but receives further tuning to produce 470 kW and 900 Nm of torque. The GT 63S will reportedly accelerate from 0-100 km/h in 3.2 seconds and attain a top speed of 315 km/h as tested by the manufacturer. Auto Bild tested 0-100 km/h in 3.0 seconds, 0–160 km/h in 6.6 seconds and 0-200 km/h in 10.2 seconds.

Additionally, all of the equipment and features from the GT 63, as well as the selectable "Drift Mode", which directs power solely to the rear wheels, comes as standard on the GT 63S as well.

Mercedes-AMG GT 63 S E-Performance
The GT 63 S E-Performance is the top-of-the-line, flagship variant of the GT 4-Door. It is the first car to be launched under Mercedes’ new E Performance brand. It features the same 4.0L M177 Biturbo V8 engine, with the same electric motor powertrain as the Mercedes-Benz AMG GT Concept. The engine alone produces 470 kW from 5,500 to 6,500 rpm, and 900 Nm from 2,500 to 4,500 rpm. It is supplemented by a rear-mounted electric motor that spins up a maximum of 204 PS for 10-second blasts and can continually provide 95 PS, and 320 Nm of torque. Its combined power output is 620 kW, with 1400 Nm of torque, making it the most powerful production AMG model ever made. The 0–60 mph sprint time can be achieved in less than three seconds. The powertrain is named ‘V8 Biturbo E-Performance’. As for the PHEV system, the 6.1 kWh battery pack with the electric motor can commit to a pure EV range of 12 km at speeds of up to 130 km/h.