Mercedes-AMG C 63 vs Audi RS7
Compare the Mercedes-AMG C 63 vs Audi RS7. The Mercedes-AMG C 63 is £27,000 cheaper. The Audi RS7 is 0.3s quicker to 60mph. The Mercedes-AMG C 63 is more fuel efficient. Full performance, cost & ownership breakdown.
The Mercedes-AMG C 63 is priced from £55,000, powered by a 4.0L Twin-Turbo V8, producing 503 hp, with 700 Nm of torque, reaching 0-60 mph in 3.8s, a top speed of 180 mph, sent to the road via rear-wheel drive. 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 0-60 mph in 3.5s, a top speed of 190 mph, sent to the road via all-wheel drive.
The Mercedes-AMG C 63 offers a 455-litre boot, folding rear seats, runs on petrol, returns around 26 mpg, is covered by a 3yr / unlimited mi warranty. The Audi RS7 offers a 535-litre boot, folding rear seats, runs on petrol, returns around 24 mpg, is covered by a 3yr / unlimited mi warranty.
On cost of ownership, the Mercedes-AMG C 63 is £27,000 cheaper than its rival, the Mercedes-AMG C 63 costs less in annual maintenance (£1,100 versus £1,200), the Mercedes-AMG C 63 is the more fuel-efficient choice, a full tank costs around £80 for the Mercedes-AMG C 63 and £90 for the Audi RS7.
Driving Character: Mercedes-AMG C 63 vs Audi RS7
The Mercedes-AMG C 63 remains a titan of the executive performance segment, defined by its thunderous 4.0L twin-turbo V8. The engine delivers a character that is increasingly rare, offering an aggressive, theatrical soundscape that is amplified by the mechanical limited-slip differential. The rear-wheel-drive platform provides a traditional, tail-happy balance that rewards a skilled driver, though the sheer power output requires significant caution in adverse weather conditions. It is a car that thrives on the open road, where the balance of torque and power delivery can be fully exploited, making it a visceral, highly engaging piece of German engineering.
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.
Head-to-head, the division is clear: the Mercedes-AMG C 63 takes our 0-100 driving character grading, 84 against 75. Characteristic of the Mercedes-AMG C 63: Thunderous twin-turbo V8 with a playful, adjustable rear-drive character. For the Audi RS7: Effortless, quattro-assured pace in a genuinely luxurious package. In outright terms it is 503 hp against 591 — a 88 hp gap — and the Audi RS7 reaches 60 mph 0.3s sooner.
Interior & Cabin: Mercedes-AMG C 63 vs Audi RS7
Inside, the C 63 is a blend of high-end executive luxury and focused performance. The cabin features premium Nappa leather and DINAMICA materials, with AMG-specific detailing that differentiates it from the standard C-Class. The Performance seats provide excellent support during spirited driving while remaining comfortable for daily commuting. Infotainment is delivered through a high-resolution interface that is ergonomic and well-integrated. While the rear seats offer adequate space for adults, the overall interior environment feels sophisticated, maintaining a luxurious ambience that balances the car's extreme performance capabilities with the comfort expected of a premium Mercedes 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.
Head-to-head, the division is clear: the Audi RS7 takes our 0-100 interior & cabin grading, 76 against 88. Characteristic of the Mercedes-AMG C 63: Flamboyant, premium-feeling cabin with supportive seats. For the Audi RS7: Spacious, premium cabin with excellent tech and comfort.
Daily Usability: Mercedes-AMG C 63 vs Audi RS7
Practicality is a cornerstone of the C 63's appeal, offering a 455-litre boot that handles everyday chores with ease. In Comfort mode, the suspension softens significantly, turning the car into a compliant cruiser capable of managing motorway miles without fatigue. It is a vehicle that transitions effortlessly from a daily office commuter to a weekend sports machine. The only real trade-off for this usability is the fuel consumption, which is significant under load, and the wide wheel arches and stance that can make navigating tight city streets or multi-storey car parks an exercise in careful spatial awareness.
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.
Head-to-head, the division is clear: the Audi RS7 takes our 0-100 daily usability grading, 70 against 82. Characteristic of the Mercedes-AMG C 63: Comfortable, well-isolated cruiser despite its firm setup. For the Audi RS7: A genuine luxury daily driver with supercar-embarrassing pace. that means 455 litres of boot space against 535, and everyday running costs that favour the Mercedes-AMG C 63 at the pumps.
Ownership: Mercedes-AMG C 63 vs Audi RS7
Owning a C 63 is a relatively straightforward experience, thanks to the vast global Mercedes dealer network and the availability of specialist support. Maintenance is predictably expensive, with high-performance components like tyres and brakes requiring frequent attention, but the overall reliability of the powertrain is well-regarded among the community. As the industry moves toward electrification, the W205 C 63's naturally aspirated-feel V8 is increasingly seen as a desirable classic, helping to stabilise residual values. It remains a benchmark for the segment, offering a combination of daily utility and performance that continues to attract a strong, loyal owner base.
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.
Head-to-head, the division is clear: the Audi RS7 takes our 0-100 ownership grading, 66 against 75. Characteristic of the Mercedes-AMG C 63: Feels robustly screwed together. For the Audi RS7: Strong owner-reported reliability (4.7/5 per KBB after 50k miles). On the wallet the two diverge at £55,000 versus £105,000 — a £50,000 difference, with annual maintenance of £1,100 against £1,200.