Audi RS5 Sportback vs Mercedes-AMG C 63
Compare the Audi RS5 Sportback vs Mercedes-AMG C 63. The Audi RS5 Sportback is £13,000 cheaper. The Mercedes-AMG C 63 is 0.1s quicker to 60mph. The Audi RS5 Sportback is more fuel efficient. Full performance, cost & ownership breakdown.
The Audi RS5 Sportback is priced from £65,000, powered by a 2.9L Twin-Turbo V6, producing 444 hp, with 600 Nm of torque, reaching 0-60 mph in 3.9s, a top speed of 174 mph, sent to the road via all-wheel drive. 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 RS5 Sportback offers a 480-litre boot, folding rear seats, runs on petrol, returns around 30 mpg, is covered by a 3yr / unlimited mi warranty. 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.
On cost of ownership, the Audi RS5 Sportback is £13,000 cheaper than its rival, the Audi RS5 Sportback costs less in annual maintenance (£1,000 versus £1,100), the Audi RS5 Sportback is the more fuel-efficient choice, a full tank costs around £80 for the Audi RS5 Sportback and £80 for the Mercedes-AMG C 63.
Driving Character: Audi RS5 Sportback vs Mercedes-AMG C 63
The RS5 Sportback delivers a sophisticated driving experience focused on immense, all-weather pace. Its 2.9L twin-turbo V6 pushes 444 hp, providing a linear and authoritative surge of acceleration that makes the 0-60 sprint feel effortless. The Quattro system, paired with a sport differential, ensures the chassis feels planted and neutral, even in challenging conditions. While it may lack the raw, emotive bark of a V8, the technical precision is hard to ignore. It is a car that covers ground with clinical efficiency, keeping the driver composed and confident regardless of the severity of the road surface.
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.
Head-to-head, the division is clear: the Mercedes-AMG C 63 takes our 0-100 driving character grading, 72 against 84. Characteristic of the Audi RS5 Sportback: Composed, quattro-assured pace with a characterful twin-turbo V6. For the Mercedes-AMG C 63: Thunderous twin-turbo V8 with a playful, adjustable rear-drive character. In outright terms it is 444 hp against 503 — a 59 hp gap — and the Mercedes-AMG C 63 reaches 60 mph 0.1s sooner.
Interior & Cabin: Audi RS5 Sportback vs Mercedes-AMG C 63
The cabin is a triumph of function and premium finish, centring on the high-resolution Virtual Cockpit. Everything is exactly where a driver would expect it, with high-quality materials and a robust build feel that characterises Audi’s best interiors. The Sportback silhouette does slightly compromise headroom for rear passengers, though the four-door configuration makes it far more accessible than a traditional coupe. It feels intimate yet spacious, balancing a cockpit-style atmosphere with sufficient room for adults. While it shares some architecture with the standard A5, the RS-specific trim and seating elevate the experience to something truly special.
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.
Head-to-head, the division is clear: the Audi RS5 Sportback takes our 0-100 interior & cabin grading, 82 against 76. Characteristic of the Audi RS5 Sportback: Spacious, well-finished cabin with practical 5-door hatch access. For the Mercedes-AMG C 63: Flamboyant, premium-feeling cabin with supportive seats.
Daily Usability: Audi RS5 Sportback vs Mercedes-AMG C 63
Practicality is the RS5 Sportback’s hidden talent, blending high performance with genuine usability. The 480L boot is surprisingly cavernous, and the rear doors make loading children or shopping a non-issue. Its footprint is manageable for urban environments, allowing for relatively stress-free parking. The ride, while undeniably firm when set to Dynamic, remains supple in Comfort, smoothing out motorway undulations effectively. It is a car that thrives on long-distance grand touring, where its stability and power come into their own, yet it remains perfectly at home running mundane errands through a congested city centre.
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.
Head-to-head, the division is clear: the Audi RS5 Sportback takes our 0-100 daily usability grading, 85 against 70. Characteristic of the Audi RS5 Sportback: Genuinely practical everyday performance car with a usable boot. For the Mercedes-AMG C 63: Comfortable, well-isolated cruiser despite its firm setup. that means 480 litres of boot space against 455, and everyday running costs that favour the Audi RS5 Sportback at the pumps.
Ownership: Audi RS5 Sportback vs Mercedes-AMG C 63
Ownership costs for the RS5 Sportback are balanced, leaning towards the premium end of the mid-size performance spectrum. Achieving 30 mpg on a steady run is a welcome benefit of the V6 layout, though enthusiastic driving will see that figure plummet. Servicing intervals are well-structured, though the Quattro driveline does require specific attention to remain in peak condition. Audi’s expansive dealer network is a massive advantage, ensuring that parts and expertise are never far away. Strong residuals and a broad appeal make this a sound financial proposition for a high-performance vehicle, provided you are prepared for the annual maintenance budget.
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.
Head-to-head, the division is clear: the Audi RS5 Sportback takes our 0-100 ownership grading, 78 against 66. Characteristic of the Audi RS5 Sportback: Strong Audi reliability reputation. For the Mercedes-AMG C 63: Feels robustly screwed together. On the wallet the two diverge at £65,000 versus £55,000 — a £10,000 difference, with annual maintenance of £1,000 against £1,100.