Mercedes-AMG SL 63 vs Audi RS7
Compare the Mercedes-AMG SL 63 vs Audi RS7. The Audi RS7 is £60,000 cheaper. The Audi RS7 is 0.0s quicker to 60mph. The Audi RS7 is more fuel efficient. Full performance, cost & ownership breakdown.
The Mercedes-AMG SL 63 is priced from £165,000, powered by a 4.0L Twin-Turbo V8, producing 577 hp, with 800 Nm of torque, reaching 0-60 mph in 3.5s, a top speed of 196 mph, sent to the road via all-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 SL 63 offers a 213-litre boot, runs on petrol, returns around 24 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 Audi RS7 is £60,000 cheaper than its rival, the Audi RS7 costs less in annual maintenance (£1,500 versus £1,200), a full tank costs around £90 for the Mercedes-AMG SL 63 and £90 for the Audi RS7.
Driving Character: Mercedes-AMG SL 63 vs Audi RS7
The Mercedes-AMG SL 63 transitions the lineage toward a sophisticated grand tourer profile, prioritising compliance over the surgical precision of its predecessor. The 4.0-litre twin-turbo V8 delivers a relentless surge of torque, managed by an all-wheel-drive system that ensures composure in challenging UK conditions. While the AMG Active Ride Control suspension offers remarkable poise for a heavy convertible, the steering feel remains somewhat insulated compared to pure sports cars. It excels as a high-speed cruiser rather than a track-day weapon, favouring long-distance refinement and effortless pace over the frantic, razor-sharp feedback once associated with the AMG brand.
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 SL 63 takes our 0-100 driving character grading, 78 against 75. Characteristic of the Mercedes-AMG SL 63: Composed, quattro-like AWD grip with genuine open-top GT character. For the Audi RS7: Effortless, quattro-assured pace in a genuinely luxurious package. In outright terms it is 577 hp against 591 — a 14 hp gap — and the Audi RS7 reaches 60 mph 0.0s sooner.
Interior & Cabin: Mercedes-AMG SL 63 vs Audi RS7
Inside, the SL 63 feels thoroughly modern, dominated by a portrait-oriented MUX interface that dictates the cabin aesthetic. The digital cockpit is crisp, though the heavy reliance on touch-sensitive surfaces can feel counterintuitive when pressing on. Material quality is excellent, with high-grade leathers and metals, yet the ergonomics are compromised by the vestigial rear seats, which serve more as shelf space than viable seating. It lacks the intimate, driver-focused cocoon of the previous AMG GT, opting instead for a broad, open-air cockpit design that prioritises perceived luxury and connectivity over raw, tactile immersion.
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, 85 against 88. Characteristic of the Mercedes-AMG SL 63: Luxurious, modern cabin with excellent build quality. For the Audi RS7: Spacious, premium cabin with excellent tech and comfort.
Daily Usability: Mercedes-AMG SL 63 vs Audi RS7
Daily utility is remarkably improved, largely due to the transition to a fully variable fabric roof that saves significant boot space and lowers the centre of gravity. The 213-litre capacity remains tight, though it accommodates soft luggage better than the old hard-top systems. Parking remains a chore; the wide, low-slung bodywork requires cautious navigation through tight urban gaps, and the extensive bonnet length demands foresight. Nevertheless, the sophisticated suspension tuning allows it to soak up poorly maintained road surfaces with grace, making it a viable, albeit thirsty, companion for regular motorway commutes and long-distance touring.
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, 68 against 82. Characteristic of the Mercedes-AMG SL 63: Comfortable, capable long-distance convertible for daily use. For the Audi RS7: A genuine luxury daily driver with supercar-embarrassing pace. that means 213 litres of boot space against 535.
Ownership: Mercedes-AMG SL 63 vs Audi RS7
Ownership is bolstered by the vast, well-integrated Mercedes-Benz dealer network, which provides consistent support for the complex AMG powertrain. Maintenance costs are steep, with annual services reflecting the performance-oriented nature of the twin-turbo V8, and the intricate soft-top mechanism introduces a long-term servicing variable that owners must anticipate. While depreciation is generally mitigated by the enduring prestige of the SL moniker, the market is competitive. Reliability is generally predictable, provided the rigid servicing intervals are respected, ensuring the complex electronics and drivetrain remain within optimal operating parameters throughout the ownership period.
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, 68 against 75. Characteristic of the Mercedes-AMG SL 63: Backed by Mercedes-AMG's established reliability record. For the Audi RS7: Strong owner-reported reliability (4.7/5 per KBB after 50k miles). On the wallet the two diverge at £165,000 versus £105,000 — a £60,000 difference, with annual maintenance of £1,500 against £1,200.