Porsche 718 Spyder RS vs Mercedes-AMG C 63
Compare the Porsche 718 Spyder RS vs Mercedes-AMG C 63. The Mercedes-AMG C 63 is £52,000 cheaper. The Porsche 718 Spyder RS is 0.4s quicker to 60mph. The Mercedes-AMG C 63 is more fuel efficient. Full performance, cost & ownership breakdown.
The Porsche 718 Spyder RS is priced from £140,000, powered by a 4.0L Flat-6, producing 493 hp, with 450 Nm of torque, reaching 0-60 mph in 3.4s, a top speed of 196 mph, sent to the road via rear-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 Porsche 718 Spyder RS offers a 125-litre boot, a usable front boot, runs on petrol, returns around 23 mpg, is covered by a 4yr / 50k 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 Mercedes-AMG C 63 is £52,000 cheaper than its rival, the Mercedes-AMG C 63 costs less in annual maintenance (£1,400 versus £1,100), the Mercedes-AMG C 63 is the more fuel-efficient choice, a full tank costs around £70 for the Porsche 718 Spyder RS and £80 for the Mercedes-AMG C 63.
Driving Character: Porsche 718 Spyder RS vs Mercedes-AMG C 63
The Porsche 718 Spyder RS is defined by its mid-engine configuration and the installation of the 4.0L flat-six from the GT3. The chassis is a masterpiece of precision, featuring RS-specific suspension geometry that rewards technical accuracy. The steering feel is sharp and communicative, offering a visceral connection to the tarmac that few modern roadsters can replicate. While it is certainly capable on a track, the engine note and open-top architecture make it a raw experience on winding B-roads. The gearshifts are lightning fast, ensuring the powertrain remains at the heart of the driving sensation throughout every spirited corner.
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 Porsche 718 Spyder RS takes our 0-100 driving character grading, 94 against 84. Characteristic of the Porsche 718 Spyder RS: GT4 RS power in an open-top body - visceral and track-honed. For the Mercedes-AMG C 63: Thunderous twin-turbo V8 with a playful, adjustable rear-drive character. In outright terms it is 493 hp against 503 — a 10 hp gap — and the Porsche 718 Spyder RS reaches 60 mph 0.4s sooner.
Interior & Cabin: Porsche 718 Spyder RS vs Mercedes-AMG C 63
Inside, the Porsche 718 Spyder RS prioritises weight saving over luxury. The carbon fibre bucket seats provide immense support, while the use of fabric door pulls and minimal sound insulation highlights its motorsport heritage. Build quality is characteristically high, though the cabin environment is undeniably sparse compared to a standard 718. The infotainment system is functional rather than flashy, providing necessary data without distracting from the task of driving. Despite the lack of plush padding, the driver-focused ergonomics remain impeccable, creating a purposeful space that reflects the uncompromising nature of the vehicle’s design philosophy.
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 Mercedes-AMG C 63 takes our 0-100 interior & cabin grading, 52 against 76. Characteristic of the Porsche 718 Spyder RS: Stripped-back, motorsport-focused cockpit. For the Mercedes-AMG C 63: Flamboyant, premium-feeling cabin with supportive seats.
Daily Usability: Porsche 718 Spyder RS vs Mercedes-AMG C 63
Daily utility is clearly secondary to performance in the Porsche 718 Spyder RS, yet it remains surprisingly manageable. The inclusion of a nose lift system as standard allows for navigation over urban speed bumps and steep inclines without damaging the front splitter. Storage is adequate for a weekend getaway, with both a front boot and a rear luggage compartment available for essential items. Ingress and egress require some physical agility due to the low-slung bucket seats and side sills, but for owners who accept the compromise of a manual roof operation, it serves as a usable roadster.
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 Mercedes-AMG C 63 takes our 0-100 daily usability grading, 38 against 70. Characteristic of the Porsche 718 Spyder RS: Usable but clearly built for spirited driving over commuting. For the Mercedes-AMG C 63: Comfortable, well-isolated cruiser despite its firm setup. that means 125 litres of boot space against 455, plus a usable front boot in the Porsche 718 Spyder RS, and everyday running costs that favour the Mercedes-AMG C 63 at the pumps.
Ownership: Porsche 718 Spyder RS vs Mercedes-AMG C 63
Ownership of the Porsche 718 Spyder RS is defined by its exclusivity and potential for appreciation. As a model with limited production, it sits in a secure position within the enthusiast market. While annual maintenance costs are high, the support provided by the Porsche Motorsport division offers peace of mind for specialized mechanical needs. Insurance premiums will be substantial, and the high purchase price requires careful consideration, but the prospect of long-term residual strength remains strong. For collectors and enthusiasts alike, it represents a peak of internal combustion performance within the Porsche stable.
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 Porsche 718 Spyder RS takes our 0-100 ownership grading, 78 against 66. Characteristic of the Porsche 718 Spyder RS: Mechanically simple, Porsche-grade reliability. For the Mercedes-AMG C 63: Feels robustly screwed together. On the wallet the two diverge at £140,000 versus £55,000 — a £85,000 difference, with annual maintenance of £1,400 against £1,100, and warranty cover of 4yr / 50k mi versus 3yr / unlimited mi.