22 MPG combined might initially sound modest for a 2.0L four-cylinder, but this number for the 2025 Mercedes-Benz AMG GT 43 Coupe is a statement of intent. This is more than just a four-cylinder; it’s an AMG-crafted, longitudinally mounted, electrically turbocharged engine. It makes 416 horsepower and 369 lb-ft of torque, augmented by a 13-hp integrated starter generator. This powertrain is a high-performance machine built for exhilaration, a technological showcase engineered to deliver supercar-baiting acceleration and track-ready dynamics in a sleek, luxurious package. Buyers of the AMG GT 43 aren’t scrutinizing every fractional MPG, but they do appreciate the engineering that allows such performance to coexist with a relatively frugal fuel consumption figure that wouldn’t have been conceivable just a decade ago. They’re buying into the AMG mystique, the precision, the sound, and the undeniable presence of two doors and a very long hood, and for them, 22 MPG is a surprisingly efficient byproduct of all that. Mercedes-AMG can extract immense power and still achieve respectable fuel economy for a vehicle with such a singular, performance-driven mission.

City and highway performance

Digging deeper into the EPA estimates, the 2025 AMG GT 43 Coupe shows 19 MPG in the city and 27 MPG on the highway. The city figure, 19 MPG, is where the integrated starter generator and nine-speed automatic transmission actively work to modulate consumption. In stop-and-go traffic, the electric assist not only smooths out power delivery but also allows for more aggressive engine shut-off and coasting scenarios, helping to mitigate the thirst of a performance engine ready to rocket forward at a moment’s notice. The highway figure of 27 MPG is genuinely impressive for a dedicated sports car, enabling long-distance cruises without constant fuel stops. This is where the nine-speed transmission truly shines, allowing the 2.0L engine to settle into a remarkably low RPM at cruising speeds, keeping the turbocharger largely dormant and optimizing efficiency. It’s this dual nature, savage performance when provoked and composed, reasonably efficient cruising, that defines the GT 43’s character and attracts buyers who want the best of both worlds, even if their primary motivation isn’t fuel conservation.

Annual fuel cost

The EPA estimates an annual fuel cost of $2,650 for the 2025 Mercedes-Benz AMG GT 43 Coupe. This figure is based on a methodology that assumes 15,000 miles of driving per year, split approximately 45% city and 55% highway, and using national average fuel prices, which for a premium performance vehicle like the GT 43 would mean premium unleaded gasoline. For the individual purchasing an AMG GT 43, this annual cost is a minor consideration within the broader context of luxury sports car ownership, which includes significant depreciation, insurance, and maintenance. However, it’s a transparency point, clearly outlining the expected expenditure for regular driving. The running cost for fuel remains within reasonable bounds for its class, particularly given its performance pedigree. This allows owners to enjoy the vehicle without feeling excessively penalized at the pump, even if it’s not the primary driver in their purchase decision.

Real-world expectations

In the real world, the 2025 AMG GT 43 Coupe’s fuel economy will fluctuate considerably depending on driving style. Hard acceleration, frequent use of Sport+ mode, and track days will understandably drop the MPG figures well below the EPA estimates, likely into the mid-teens. The purpose of an AMG GT is to be driven with enthusiasm, to explore the limits of its incredibly capable chassis and powerful engine. Expecting EPA numbers during spirited driving is unrealistic and misses the point of owning such a machine. Conversely, on a long, sedate highway journey, particularly one with minimal elevation changes, drivers might find themselves even exceeding the 27 MPG highway rating. The advanced nine-speed automatic transmission and the mild-hybrid system are adept at optimizing efficiency when the driver isn’t demanding maximum performance. The owner of an AMG GT 43 isn’t buying a fuel-sipper, but they appreciate that when they choose to drive conservatively, the car rewards them with surprising efficiency, a welcome bonus to their primary love of performance and luxury. It’s a car that gives you options: tire-shredding performance or surprisingly economical cruising.

How it compares

The 2025 Mercedes-Benz AMG GT 43 Coupe positions itself in a competitive segment, but its unique blend of performance, luxury, and inline-four power makes direct comparisons tricky. Consider the Porsche 911 Carrera (base model), with its 3.0L twin-turbo flat-six, which achieves 21 MPG combined (18 city/25 highway). The AMG GT 43 offers slightly better highway efficiency and nearly identical city economy, all while delivering a similar level of raw performance with its electrified 2.0L. A BMW M4 Competition Coupe, with its 3.0L twin-turbo inline-six, returns 18 MPG combined (16 city/23 highway). Here, the AMG GT 43 clearly outclasses the M4 in efficiency, a noteworthy achievement considering its power output. Even a Lexus LC 500 Coupe, equipped with a naturally aspirated 5.0L V8, manages a meager 19 MPG combined (16 city/25 highway), falling short across the board. The AMG GT 43’s buyers are those who appreciate cutting-edge engineering and the specific character of an AMG-tuned powertrain. They also value the exclusivity and design language inherent in a Mercedes Benz two-door sports car, and for them, the more efficient powerplant of the GT 43 offers a tangible benefit without compromising on performance or prestige. For more on the brand’s performance models, check out AMG MPG across all years. The relatively more efficient 2.0L setup of the GT 43 also differentiates it from its V8-powered AMG GT siblings, offering a distinct, slightly more pragmatic entry into AMG GT ownership, without sacrificing the core AMG experience.

Tips to maximize efficiency

Engaging the car’s “Comfort” or “Eco” driving modes will significantly alter the transmission’s shift points and throttle mapping, encouraging earlier upshifts and a more relaxed power delivery. This can substantially improve city and highway MPG by preventing the engine from staying in its higher, less efficient RPM ranges. Coasting smoothly to stops rather than braking abruptly helps regenerate energy through the mild-hybrid system, more effectively recharging the 48-volt battery and thus reducing the load on the engine. Avoiding aggressive acceleration from a standstill, especially when not necessary, minimizes the turbocharger’s boost and the engine’s fuel consumption. Using the paddle shifters to manually select higher gears when cruising at lower speeds can help keep the engine RPM down, optimizing the efficiency of the 2.0L turbocharged unit. Maintaining proper tire pressure is crucial for any vehicle, but in a high-performance sports car like the AMG GT 43, correctly inflated tires reduce rolling resistance and contribute to both better fuel economy and optimal handling dynamics.