2027 Mercedes-AMG GLE 63 S Coupe Keeps Its 603-HP V8

The 2027 Mercedes-AMG GLE 63 S Coupe keeps the engine buyers expect: a handcrafted 4.0-liter twin-turbo V8. AMG calls the revised unit M177 EVO, and output stays at 603 hp and 627 lb-ft. The deeper change sits inside the crankcase, where a flat-plane crankshaft cuts rotating mass and sharpens throttle response.

Mercedes pairs the V8 with a 48-volt integrated starter-generator that supplies 23 hp and 151 lb-ft. Consequently, the electrical system fills low-rpm gaps, recovers energy under deceleration, and restarts the engine smoothly.

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2027 Mercedes-AMG GLE 63 S Coupe Specifications

Looking at the data, AMG did not chase a larger peak horsepower figure. Engineers revised the injection system, intake and exhaust ports, intake camshaft, compressor wheel, turbocharger housing, and exhaust aftertreatment. Those changes target cleaner combustion, quicker response, and emissions compliance.

Why the Flat-Plane Crankshaft Matters

A flat-plane crankshaft uses evenly spaced firing pulses and carries less rotating mass than a traditional cross-plane design. Specifically, that geometry lets the V8 gain revs faster and feeds the turbochargers cleaner exhaust pulses. The design can add vibration, so mounts and balancing hardware carry greater responsibility.

From an expert perspective, this engineering choice protects the V8 without adding the mass of a large plug-in hybrid battery. The 48-volt system handles low-rpm assistance and recuperation.

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Chassis, Towing, and Real-Use Numbers

The AMG Ride Control+ air suspension pairs adaptive dampers with active roll control. In addition, Trail mode raises the body by 2.17 inches, while Sport settings lower it by 0.39 inch to reduce drag and lower the center of gravity. Drivers can also request a 0.79-inch lift for steep driveways or rough access roads.

Mercedes has not released final U.S. dimensions for the 2027 Coupe. The current U.S.-market model provides a useful size reference:

These figures explain the engineering challenge. The Coupe carries five adults, large brakes, air springs, active anti-roll hardware, and heavy cooling equipment, yet it reaches highway speed at a supercar pace.

Interior Technology and Design Changes

The cabin gains the Mercedes-Benz operating system with AMG graphics, connected updates, and artificial-intelligence voice control. The wider 2027 GLE range uses three 12.3-inch displays. Micro-LED headlights expand the lighting field by roughly 40 percent and cut energy use by as much as 50 percent.

A redesigned front end adds larger cooling openings, an AMG grille, and a model-specific light signature. Four exhaust outlets and a revised rear diffuser preserve the expected visual aggression.

2027 GLE 63 S Coupe vs. Direct Rivals

By comparison, the Audi posts the quickest quoted sprint at a price close to the BMW. The Porsche wins on horsepower but costs roughly $30,000 above the Audi before options. The Mercedes counters with 7,700 pounds of towing capacity, active air suspension, useful ride-height adjustment, and a V8 that now responds faster without a large traction battery.