Audi RS7 vs Mercedes-AMG C 63 S Saloon
Compare the Audi RS7 vs Mercedes-AMG C 63 S Saloon. The Mercedes-AMG C 63 S Saloon is £27,000 cheaper. The Audi RS7 is 0.4s quicker to 60mph. The Mercedes-AMG C 63 S Saloon is more fuel efficient. Full performance, cost & ownership breakdown.
The Audi RS7 is priced from £105,000, powered by a 4.0L Twin-Turbo V8, producing 591 hp, with 800 Nm of torque, reaching 0-62 mph in 3.6 s, a top speed of 155 mph (standard limiter), sent to the road via all-wheel drive. The Mercedes-AMG C 63 S Saloon is priced from £55,000, powered by a 4.0L Twin-Turbo V8, producing 503 hp, with 700 Nm of torque, reaching 0-62 mph in 4 s, a top speed of 180 mph, sent to the road via rear-wheel drive.
The Audi RS7 offers a 535-litre boot, folding rear seats, runs on petrol, returns around 24 mpg, is covered by a 3 years / 60,000 miles (original UK cover; first 2 years unlimited) warranty. The Mercedes-AMG C 63 S Saloon offers a 435-litre boot, folding rear seats, runs on petrol, returns around 26 mpg, is covered by a 3 years / unlimited miles (original UK new-car cover) warranty.
On cost of ownership, the Mercedes-AMG C 63 S Saloon is £27,000 cheaper than its rival, the Mercedes-AMG C 63 S Saloon costs less in annual maintenance (£1,200 versus £1,100), the Mercedes-AMG C 63 S Saloon is the more fuel-efficient choice, the Audi RS7 has 73 L fuel tank.
Driving Character: Audi RS7 vs Mercedes-AMG C 63 S Saloon
The RS7 occupies a unique space, marrying the brutal acceleration of a 4.0L twin-turbo V8 with the visual drama of a low-slung, sweeping Sportback. With 591 hp and the advanced Quattro system, it delivers devastating straight-line performance that feels relentless and almost telepathic. All-wheel steering is standard, giving this imposing car an agility that defies its substantial weight in the corners. It is a machine designed for covering vast distances at high speed with effortless ease, providing a level of poise that turns even the most demanding road into a manageable ribbon of asphalt.
The W205 facelift C 63 S Saloon combines a 375 kW V8 with rear-wheel drive. Its MCT gearbox uses a wet start-off clutch. Adaptive damping and an electronic rear differential support its performance character. This entry represents the petrol V8 saloon.
Head-to-head, the division is clear: the Audi RS7 — 591hp V8 in Sportback body; fast estate performance at a premium; the Mercedes-AMG C 63 S Saloon — 4.0-litre twin-turbo V8 and rear-wheel drive. Characteristic of the Audi RS7: Quattro AWD with Sport differential; planted and fast in all weathers. For the Mercedes-AMG C 63 S Saloon: Nine-speed MCT gearbox and electronically controlled rear differential. In outright terms it is 591 hp against 503 — a 88 hp gap — and the Audi RS7 reaches 60 mph 0.4s sooner.
Interior & Cabin: Audi RS7 vs Mercedes-AMG C 63 S Saloon
The interior is a high-luxury environment, mirroring the technical sophistication of the RS6 but packaged within a more dramatic, coupe-like frame. The Virtual Cockpit Plus provides clear, customisable readouts, while the cabin's materials—ranging from carbon fibre to Valcona leather—exude a premium, tactile quality. Because of the raked roofline, the rear cabin feels more intimate than in the Avant version, sacrificing headroom for a more sporting aesthetic. It is undeniably a driver’s cabin, where every control feels weighted, precise, and purposefully placed to enhance the feeling of being in something truly exclusive.
The cabin follows the W205 dashboard layout. It uses a separate central infotainment display and centre-console controls. Trim and seat specifications depend on equipment. Portrait MBUX and W206 hybrid descriptions have been removed.
Head-to-head, the division is clear: the Audi RS7 — Fastback Sportback gives dramatic profile with genuine four-seat practicality; the Mercedes-AMG C 63 S Saloon — Four-door W205 cabin with separate central display. Characteristic of the Audi RS7: Latest Audi MMI infotainment and Virtual Cockpit; technology class-leading. For the Mercedes-AMG C 63 S Saloon: Facelift instrument and steering-wheel controls; equipment varies by car.
Daily Usability: Audi RS7 vs Mercedes-AMG C 63 S Saloon
While the RS7 is undoubtedly a performance vehicle, its Sportback design offers a practical twist. The 535L boot is more than sufficient for typical weekend trips, and the lift-back opening makes loading gear straightforward. Urban use requires awareness; its significant width and low stance mean care is needed in narrow parking structures, though the array of sensors and cameras makes it doable. In Comfort mode, the air suspension does a commendable job of masking road surface harshness, ensuring that urban traffic or motorway cruising is conducted with a sense of refined, whisper-quiet calm.
The UK specification lists a 435-litre boot. The four-door body supports daily passenger use. This V8 model has no plug-in charging or electric-only mode.
Head-to-head, the division is clear: the Audi RS7 — 535L boot with folding seats; more practical than its sporting profile suggests; the Mercedes-AMG C 63 S Saloon — Five-seat saloon layout and 435-litre boot. Characteristic of the Audi RS7: Mild hybrid system improves fuel economy on long journeys. For the Mercedes-AMG C 63 S Saloon: 11.8-metre turning circle in the UK brochure. that means 535 litres of boot space against 435, and everyday running costs that favour the Mercedes-AMG C 63 S Saloon at the pumps.
Ownership: Audi RS7 vs Mercedes-AMG C 63 S Saloon
As a flagship performance model, the RS7 commands a premium in terms of running costs. Fuel consumption is consistent with a high-output V8, and the long-term maintenance requires a dedicated budget for tyres, brakes, and scheduled service checks. Audi’s dealer network ensures that this level of care is easily accessible, and the car's desirable styling keeps residual values firm amongst performance-oriented buyers. It is a car that demands a commitment to its upkeep, but in exchange, it offers an ownership experience defined by style, speed, and the confidence that comes with a top-tier automotive engineering product.
This is a petrol V8 ownership profile. Hybrid battery warranty and electric-range claims do not apply. Existing price history is retained for the separate pricing review.
Head-to-head, the division is clear: the Audi RS7 — Audi dealer network widest in this class; RS7 supported everywhere; the Mercedes-AMG C 63 S Saloon — Mercedes-Benz servicing and AMG component support. Characteristic of the Audi RS7: Strong residuals for RS7; demand from dual-purpose buyers keeps values firm. For the Mercedes-AMG C 63 S Saloon: Confirm service history, tyres and brake specification on the individual car. On the wallet the two diverge at £105,000 versus £55,000 — a £50,000 difference, with annual maintenance of £1,200 against £1,100, and warranty cover of 3 years / 60,000 miles (original UK cover; first 2 years unlimited) versus 3 years / unlimited miles (original UK new-car cover).