Mercedes-AMG GT vs Porsche 911 Turbo S
Compare the Mercedes-AMG GT vs Porsche 911 Turbo S. The Mercedes-AMG GT is £20,000 cheaper. The Porsche 911 Turbo S is 0.5s quicker to 60mph. The Mercedes-AMG GT is more fuel efficient. Full performance, cost & ownership breakdown.
The Mercedes-AMG GT is priced from £155,000, powered by a 4.0L Twin-Turbo V8, producing 577 hp, with 800 Nm of torque, reaching 0-60 mph in 3.1s, a top speed of 197 mph, sent to the road via rear-wheel drive. The Porsche 911 Turbo S is priced from £175,000, powered by a 3.8L Twin-Turbo Flat-6, producing 640 hp, with 800 Nm of torque, reaching 0-60 mph in 2.6s, a top speed of 205 mph, sent to the road via all-wheel drive.
The Mercedes-AMG GT offers a 350-litre boot, runs on petrol, returns around 22 mpg, is covered by a 3yr / unlimited mi warranty. The Porsche 911 Turbo S offers a 128-litre boot, a usable front boot, runs on petrol, returns around 20 mpg, is covered by a 4yr / 50k mi warranty.
On cost of ownership, the Mercedes-AMG GT is £20,000 cheaper than its rival, the Mercedes-AMG GT costs less in annual maintenance (£1,600 versus £1,800), the Mercedes-AMG GT is the more fuel-efficient choice, a full tank costs around £85 for the Mercedes-AMG GT and £90 for the Porsche 911 Turbo S.
Driving Character: Mercedes-AMG GT vs Porsche 911 Turbo S
The Mercedes-AMG GT demonstrates the prowess of a front-mid engine layout, prioritising balance and direct feedback for the enthusiast driver. With 577hp directed to the rear wheels via a mechanical limited-slip differential, the car offers a visceral, involving experience. Steering is sharp and communicative, allowing for precise placement in corner apexes, though the rear-wheel-drive platform demands respect in damp conditions. Acceleration is blistering, with a 3.1-second 0-60mph sprint. While less forgiving than its AWD competitors, the AMG GT rewards committed driving with a dynamic repertoire that remains a benchmark for pure driver engagement within the contemporary supercar class.
The Porsche 911 Turbo S utilises a sophisticated AWD system with active torque vectoring that provides staggering, all-weather performance. It feels deceptively rapid, with a chassis control system that masks its immense power through cornering, yet it ultimately insulates the driver more than the GT-spec siblings, prioritizing crushing point-to-point speed over nuanced steering feel.
Head-to-head, the division is clear: the Porsche 911 Turbo S takes our 0-100 driving character grading, 82 against 88. Characteristic of the Mercedes-AMG GT: Thunderous AMG V8 with a more usable, GT-focused character than before. For the Porsche 911 Turbo S: Immense, effortless all-wheel-drive pace with real depth of ability. In outright terms it is 577 hp against 640 — a 63 hp gap — and the Porsche 911 Turbo S reaches 60 mph 0.5s sooner.
Interior & Cabin: Mercedes-AMG GT vs Porsche 911 Turbo S
Inside, the AMG GT presents a cockpit-like environment dominated by a high transmission tunnel and a wide, driver-centric dashboard. The interior materials are of a high standard, showcasing bespoke AMG instruments and Alcantara detailing. Space is deliberately intimate, reflecting the car’s focused nature rather than grand touring comfort. Visibility is somewhat compromised by the low-slung roofline and thick pillars, yet the driving position is perfectly aligned with the pedals and steering wheel. It is an environment designed to insulate the driver from distractions, keeping the focus squarely on the task of piloting a high-performance machine through demanding roads.
The cabin is remarkably refined for such a potent machine, making it a genuinely usable daily GT car. It features the signature Sport Chrono dial and luxury seating, with all technology packages seamlessly integrated. While the material quality is high, it lacks the bespoke flair or artisanal material choices found in certain Italian rivals at this price point.
Head-to-head, the division is clear: the Mercedes-AMG GT takes our 0-100 interior & cabin grading, 84 against 84. Characteristic of the Mercedes-AMG GT: Genuinely usable 2+2 cabin with strong build quality. For the Porsche 911 Turbo S: Supportive, comfortable seats and modern, user-friendly cabin.
Daily Usability: Mercedes-AMG GT vs Porsche 911 Turbo S
Usability in the AMG GT is naturally restricted by its performance-oriented design. The front trunk provides a 260-litre storage area, adequate for light travel but far from comprehensive for extended road trips. The suspension is remarkably firm even in Comfort mode, which can result in an unsettled ride on poor surfaces or urban speed bumps. Ingress and egress require a degree of physical dexterity, given the low ride height and sculpted seats. While the car can manage city errands, its primary habitat remains the open road where its performance credentials can be exercised without the constraints of suburban infrastructure.
As the most practical 911 variant, the Turbo S offers genuine all-season confidence thanks to its AWD architecture. Its clever combination of a front boot and rear storage allows for meaningful luggage space, though the expansive body width can create significant challenges in tight urban environments. Furthermore, its sheer performance demands regular attention to tyre wear.
Head-to-head, the division is clear: the Porsche 911 Turbo S takes our 0-100 daily usability grading, 72 against 90. Characteristic of the Mercedes-AMG GT: More practical than the previous 2-seat GT thanks to rear seats. For the Porsche 911 Turbo S: The most daily-usable supercar on sale — comfortable, quiet, easy to place. that means 350 litres of boot space against 128, plus a usable front boot in the Porsche 911 Turbo S, and everyday running costs that favour the Mercedes-AMG GT at the pumps.
Ownership: Mercedes-AMG GT vs Porsche 911 Turbo S
Owning an AMG GT is an investment in the traditional, high-performance V8 heritage of the brand. Residual values remain strong, bolstered by consistent demand from enthusiasts who prize the V8 character. Servicing is handled through the robust Mercedes dealer network, ensuring that specialists are always within reach, though owners must prepare for high costs associated with performance-grade brakes and tyres. Annual maintenance of £1,600 is standard for the class. Insurance costs reflect the car’s high performance and the complexity of its mechanical components, yet the model remains a prized inclusion in the garages of those who value pure engagement.
Maintaining a stellar reputation for reliability, this model remains a benchmark for high-performance usability. It commands premium residuals in the used market, consistently holding its value well. However, prospective owners must account for high annual maintenance costs, with the complex PDK transmission and AWD system adding significant weight to long-term service intervals compared to simpler sports cars.
Head-to-head, the division is clear: the Porsche 911 Turbo S takes our 0-100 ownership grading, 68 against 88. Characteristic of the Mercedes-AMG GT: Backed by Mercedes-AMG's established V8 reliability record. For the Porsche 911 Turbo S: Exceptionally reliable for a car with supercar performance. On the wallet the two diverge at £155,000 versus £175,000 — a £20,000 difference, with annual maintenance of £1,600 against £1,800, and warranty cover of 3yr / unlimited mi versus 4yr / 50k mi.