Mercedes-AMG GT 4-Door Coupé

Mercedes-AMG GT 4-Door Coupé
Mercedes-AMG GT 53 at the 2018 Geneva Motor Show
Overview
Manufacturer	Mercedes-AMG
Model code	X290
Production	September 2018[1]–present
Model years	2019–present
Assembly	Germany: Sindelfingen (2018–2023) Finland: Uusikaupunki (Valmet Automotive) (2023–present)[2][3]
Designer	Balázs Filczer[4]
Body and chassis
Class	Executive car (E)
Body style	5-door liftback[5]
Layout	Front-engine, rear-wheel-drive/all-wheel-drive (4Matic)
Platform	MRA
Related	Mercedes-Benz E-Class (W213) Mercedes-Benz CLS-Class (C257)
Powertrain
Engine	Petrol: 3.0 L M256 turbo I6 (43/50/53) 4.0 L M177 biturbo V8 (63/63 S) 4.0 L M177 biturbo plug-in hybrid V8 (63 S E-Performance)
Electric motor	150 kW (201 hp) synchronous electric motor (63 S E Performance)
Transmission	9-speed 9G-TRONIC automatic AMG SPEEDSHIFT MCT 9-speed automatic
Hybrid drivetrain	Plug-in (63 S E-Performance)
Battery	AMG 400-volt High Performance Battery, 4.8 kWh
Dimensions
Wheelbase	2,951 mm (116.2 in)
Length	5,054 mm (199.0 in)[6]
Width	1,953 mm (76.9 in)
Height	1,442–1,455 mm (56.8–57.3 in)
Curb weight	1,970–2,380 kg (4,343.1–5,247.0 lb)

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.^[7][8] 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.^[9]

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.^[10][11] 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 (16 kW) and 184 lb⋅ft (249 N⋅m) of torque in addition to the petrol engine when it is not powering the electrical system.^[12] This system traces its roots back to the Mercedes CLS 53.^[13][14] 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.^[15][16]

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 (362 hp; 367 PS) and 500 N⋅m (369 lbf⋅ft) of torque and the EQ Boost starter-alternator delivers additional short-term output and torque of 16 kW (21 hp) and 250 N⋅m (184 lbf⋅ft), respectively. It can accelerate from 0–100 km/h (0–62 mph) in 4.9 seconds, with a claimed top speed of 270 km/h (168 mph).^[17][18] The GT43 and GT50 are the same car (GT43 is the worldwide version, GT50 is the China only version).

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 (429 hp; 435 PS) and 520 N⋅m (384 lbf⋅ft) of torque. The starter-generator and electrically driven supercharger called EQ boost supplements the engine temporarily with 16 kW (21 hp) and 250 N⋅m (184 lbf⋅ft) of torque while under full acceleration.^[19] It can accelerate from 0–100 km/h (0–62 mph) in 4.5 seconds, along with attaining a top speed of 285 km/h (177 mph) as tested by the manufacturer.^[20][21] The suspension uses steel springs and adaptive dampers and the gearbox is a 9-speed unit that uses a conventional torque converter.^[22] 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.^[23]

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 (577 hp; 585 PS) and 800 N⋅m (590 lbf⋅ft). It has a claimed 0–62 mph (0–100 km/h) acceleration time of 3.4 seconds and a top speed of 311 km/h (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.^[24] 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.^[22]

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 (630 hp; 639 PS) and 900 N⋅m (664 lbf⋅ft) of torque. The GT 63S will reportedly accelerate from 0–100 km/h (0–62 mph) in 3.2 seconds and attain a top speed of 315 km/h (196 mph) as tested by the manufacturer.^[25] Auto Bild tested 0–100 km/h (0–62 mph) in 3.0 seconds, 0–160 km/h (0–99 mph) in 6.6 seconds and 0–200 km/h (0–124 mph) in 10.2 seconds.^[26]

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.^[16]

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 (639 PS; 630 hp) from 5,500 to 6,500 rpm, and 900 N⋅m (664 lbf⋅ft) 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 N⋅m (236 lbf⋅ft) of torque. Its combined power output is 620 kW (843 PS; 831 hp), with 1,400 N⋅m (1,033 lbf⋅ft) of torque, making it the most powerful AMG GT 4-Door model ever made. The 0–60 mph (0–97 km/h) sprint time can be achieved in less than three seconds. The powertrain is named ‘V8 Biturbo E-Performance’.^[27] 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 (81 mph).^[28]

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