Aston Martin DBX707 vs Mercedes-AMG SL 63
Compare the Aston Martin DBX707 vs Mercedes-AMG SL 63. The Mercedes-AMG SL 63 is £45,000 cheaper. The Aston Martin DBX707 is 0.2s quicker to 60mph. The Mercedes-AMG SL 63 is more fuel efficient. Full performance, cost & ownership breakdown.
The Aston Martin DBX707 is priced from £210,000, powered by a 4.0L Twin-Turbo V8, producing 707 hp, with 900 Nm of torque, reaching 0-60 mph in 3.3s, a top speed of 193 mph, sent to the road via all-wheel drive. 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 Aston Martin DBX707 offers a 632-litre boot, folding rear seats, runs on petrol, returns around 21 mpg, is covered by a 3yr / unlimited mi warranty. 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.
On cost of ownership, the Mercedes-AMG SL 63 is £45,000 cheaper than its rival, the Mercedes-AMG SL 63 costs less in annual maintenance (£1,700 versus £1,500), the Mercedes-AMG SL 63 is the more fuel-efficient choice, a full tank costs around £100 for the Aston Martin DBX707 and £90 for the Mercedes-AMG SL 63.
Driving Character: Aston Martin DBX707 vs Mercedes-AMG SL 63
The DBX707 redefines the expectations of a luxury SUV, injecting 707hp of twin-turbo V8 fury into a high-riding chassis that refuses to behave like a typical utility vehicle. With its intelligent all-wheel-drive system and electronic rear differential, it manages to put its immense power down with surprising effectiveness. While it possesses remarkable grip, the physics of its 5071 lbs weight inevitably surface during aggressive cornering. The nine-speed wet-clutch gearbox is snappy, providing gear changes that feel purposeful and sharp, allowing the driver to exploit the engine's 900Nm of torque to its absolute limit with confidence and speed.
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.
Head-to-head, the division is clear: the Aston Martin DBX707 takes our 0-100 driving character grading, 78 against 78. Characteristic of the Aston Martin DBX707: Startlingly quick and composed for a two-tonne-plus SUV. For the Mercedes-AMG SL 63: Composed, quattro-like AWD grip with genuine open-top GT character. In outright terms it is 707 hp against 577 — a 130 hp gap — and the Aston Martin DBX707 reaches 60 mph 0.2s sooner.
Interior & Cabin: Aston Martin DBX707 vs Mercedes-AMG SL 63
The interior of the DBX707 is a masterclass in performance luxury, featuring bespoke sport seats and Alcantara detailing that separates it from the standard model. It offers genuine, spacious accommodation for four adults, ensuring that performance does not come at the expense of passenger comfort. However, when compared to the ultra-modern interfaces of the Cayenne or the Urus, the cabin tech feels slightly behind the curve. While the build quality is superb and the materials are quintessentially British, the infotainment system lacks the cutting-edge fluidity of its most direct rivals at this price point.
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.
Head-to-head, the division is clear: the Aston Martin DBX707 takes our 0-100 interior & cabin grading, 85 against 85. Characteristic of the Aston Martin DBX707: Lavish, driver-focused cabin unlike most performance SUV rivals. For the Mercedes-AMG SL 63: Luxurious, modern cabin with excellent build quality.
Daily Usability: Aston Martin DBX707 vs Mercedes-AMG SL 63
Practicality is the DBX707’s greatest asset, boasting a 632-litre boot that makes it a legitimate family vehicle capable of swallowing luggage with ease. Its air suspension system with adaptive dampers allows the car to switch seamlessly between a composed, comfortable cruiser and a stiffened, responsive performance machine. While fuel economy is inevitably poor at 21mpg, the trade-off is a level of versatility rarely seen in such a powerful vehicle. It is a car that thrives on variety, handling the school run and high-speed motorways with equal parts ease and effortless, explosive capability.
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.
Head-to-head, the division is clear: the Aston Martin DBX707 takes our 0-100 daily usability grading, 82 against 68. Characteristic of the Aston Martin DBX707: Genuinely practical family SUV with supercar-baiting pace. For the Mercedes-AMG SL 63: Comfortable, capable long-distance convertible for daily use. that means 632 litres of boot space against 213, and everyday running costs that favour the Mercedes-AMG SL 63 at the pumps.
Ownership: Aston Martin DBX707 vs Mercedes-AMG SL 63
Maintaining a DBX707 is a manageable affair compared to its more exclusive siblings, thanks to the expansion of the Aston Martin dealer network and improved service accessibility. Demand for the vehicle on the used market is robust, driven by the growing appetite for high-performance SUVs, though early depreciation remains a factor for first owners. Tyre costs are significant given the car’s weight and performance, and owners must prepare for the regular attention required by such a high-output platform. Overall, it serves as a reliable, albeit premium-cost, flagship for those needing utility with a supercar-killing powertrain.
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.
Head-to-head, the division is clear: the Mercedes-AMG SL 63 takes our 0-100 ownership grading, 62 against 68. Characteristic of the Aston Martin DBX707: Strong demand keeps residuals healthy. For the Mercedes-AMG SL 63: Backed by Mercedes-AMG's established reliability record. On the wallet the two diverge at £210,000 versus £165,000 — a £45,000 difference, with annual maintenance of £1,700 against £1,500.