When you press the starter button on the Mercedes-AMG GT 63 4MATIC+, the car settles into a low, chest-vibrating idle that immediately announces its hand-built V8 engine. This four-door fastback isn't just about straight-line speed. It combines supercar-shredding track capability with the daily drivability of an executive saloon, bridging two worlds that usually demand heavy compromises.
Under the hood lies a heavily massaged 4.0-liter twin-turbocharged V8 engine paired with an advanced all-wheel-drive system and a multi-clutch transmission. It competes directly against heavyweights like the Porsche Panamera Turbo and BMW M8 Gran Coupe, carving out its territory through sheer brute force combined with sophisticated electronic chassis controls. If you want to understand why this machine commands a six-figure price tag, you have to look past the aggressive bodywork and examine how its powertrain, suspension, and aerodynamics work together under heavy load.
Powertrain and Performance Specifications
The heart of the GT 63 4MATIC+ is Affalterbach's hand-built M177 engine. This 4.0-liter biturbo V8 pushes out an immense 577 horsepower and 590 lb-ft of torque in its standard configuration, while the E Performance plug-in hybrid variants push output past the 800-horsepower mark.
Power delivery is violent yet linear. The twin twin-scroll turbochargers are placed inside the cylinder V—what engineers call a "hot V"—to minimize turbo lag and shorten exhaust paths. This layout lets the car build boost almost instantly from low revs, ensuring that throttle inputs translate to immediate forward momentum without hesitation. BBC has also covered this fascinating topic in great detail.
Engine: Hand-built 4.0L twin-turbo V8
Horsepower: 577 hp (Standard GT 63)
Torque: 590 lb-ft
Transmission: AMG Speedshift MCT 9-speed
Drivetrain: Fully variable 4MATIC+ all-wheel drive
The engine pairs with an AMG Speedshift MCT nine-speed transmission, which replaces a traditional torque converter with a wet clutch pack. This setup allows for lightning-fast upshifts and aggressive rev-matched downshifts in manual track mode.
Drivetrain and Traction Control: 4MATIC+ Explained
Power means nothing without grip. The 4MATIC+ system in the GT 63 isn't a traditional front-biased Haldex setup. It is a fully variable all-wheel-drive system featuring an electromechanically controlled clutch that connects the permanently driven rear axle to the front wheels.
Under normal driving conditions, the car can send up to 100 percent of its torque to the rear wheels, preserving the classic rear-wheel-drive handling balance that enthusiasts expect from an AMG product. When sensors detect slip or aggressive cornering inputs, the system continuously redistributes torque to the front axle in milliseconds.
For track enthusiasts, the car includes a dedicated Drift Mode. When activated in Race drive mode with stability control fully disabled, the system decouples the front axle entirely, turning the heavy luxury cruiser into a pure rear-wheel-drive powersliding machine. You can read more about Mercedes engineering standards directly at Mercedes-Benz USA.
Chassis, Suspension, and Handling Dynamics
Weighing in at over 4,300 pounds, the GT 63 4MATIC+ has to defy physics through clever engineering. Mercedes achieves this using an aluminum-heavy spaceframe architecture combined with AMG Ride Control+ multi-chamber air suspension and active roll stabilization.
The adaptive dampers use two pressure relief valves—one for rebound and one for compression—allowing independent control of wheel movement. This means the car can flatten out body roll through high-speed sweepers while remaining compliant over broken urban pavement in Comfort mode.
- Rear-Axle Steering: At low speeds, the rear wheels turn in the opposite direction of the front wheels, effectively shortening the wheelbase for tight parking maneuvers. At speeds above 62 mph, they turn in the same phase, improving high-speed stability during lane changes.
- Active Aerodynamics: An active rear spoiler adjusts its angle across multiple stages depending on vehicle speed, lateral acceleration, and drive mode, reducing drag or increasing downforce as needed.
- Braking System: Massive composite brake discs come standard, with optional carbon-ceramics available for fade-free stopping power during track sessions.
Interior Layout and Ergonomics
Inside, the cabin blends high-end luxury with motorsport-inspired design cues. The layout features a driver-centric cockpit dominated by the MBUX infotainment system and a digital instrument cluster with AMG-specific display modes.
The steering wheel is wrapped in Nappa leather and microfibre, featuring aluminum shift paddles and two round AMG Drive Unit buttons. These satellite buttons let you cycle through exhaust volumes, suspension stiffness, and drive modes without taking your hands off the rim.
Rear passenger space is surprisingly generous for a sloping roofline, though headroom can feel tight for adults over six feet tall. Cargo capacity is enhanced by a large liftgate, making it far more practical than a traditional two-door coupe.
Common Mistakes When Driving High-Power AWD Cars
Drivers transitioning into high-horsepower all-wheel-drive vehicles often fall into bad habits that degrade performance and safety.
- Abusing the Throttle Too Early: Because the 4MATIC+ system hooks up so well off the line, drivers often mash the throttle mid-corner before the tires have settled. This can induce unexpected understeer as the front tires struggle to handle both steering and driving forces.
- Ignoring Tire Pressures: Heavy luxury performance cars generate massive thermal loads in their tires. Running incorrect cold pressures ruins the contact patch and degrades handling precision on twisty roads.
- Relying Solely on Electronic Safety Nets: While the stability control system is remarkably sophisticated, physics still applies. Overestimating the limits of grip on wet or slippery surfaces can overwhelm even the best torque-vectoring systems.
Frequently Asked Questions
What is the 0-60 mph time for the Mercedes-AMG GT 63 4MATIC+?
The standard non-hybrid GT 63 sprints from 0 to 60 mph in roughly 3.1 to 3.3 seconds, depending on track conditions and tire temperature.
Is the AMG GT 63 a true four-door car?
Yes. Unlike the two-door AMG GT coupe, the GT 63 is built on a dedicated four-door fastback architecture with four traditional doors and a hatchback rear cargo opening.
How does the 4MATIC+ system differ from standard all-wheel drive?
Standard all-wheel-drive systems split power rigidly or bias it heavily toward the front. AMG 4MATIC+ is fully variable, capable of sending 100 percent of torque to the rear wheels for traditional sports car dynamics while instantly shifting power forward when slip occurs.
What kind of fuel economy does the V8 engine get?
Fuel economy is secondary in a vehicle of this class. Expect around 15 mpg in city driving and roughly 20 to 21 mpg on highway trips, assuming you resist the urge to tap into full boost frequently.
