Mercedes-AMG C 63 vs Porsche 718 Spyder
Compare the Mercedes-AMG C 63 vs Porsche 718 Spyder. The Porsche 718 Spyder is £6,000 cheaper. The Mercedes-AMG C 63 is 0.2s 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 Porsche 718 Spyder is priced from £80,000, powered by a 4.0L Flat-6, producing 414 hp, with 420 Nm of torque, reaching 0-60 mph in 4s, a top speed of 187 mph, sent to the road via rear-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 Porsche 718 Spyder offers a 150-litre boot, a usable front boot, runs on petrol, returns around 25 mpg, is covered by a 4yr / 50k mi warranty.
On cost of ownership, the Porsche 718 Spyder is £6,000 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 £70 for the Porsche 718 Spyder.
Driving Character: Mercedes-AMG C 63 vs Porsche 718 Spyder
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 Porsche 718 Spyder offers a purist’s approach to roadster dynamics, retaining the naturally aspirated 4.0-litre flat-six and a manual gearbox for maximum engagement. The mid-engine layout provides exceptional balance, allowing the driver to feel every nuance through the steering wheel. Its handling is defined by a lightness of touch that differentiates it from the heavier convertible segments, making it exceptionally agile on winding backroads. While it shares much with the GT4, the open-top configuration adds an extra layer of sensory connection, making it an incredibly visceral and rewarding machine for the true enthusiast.
Head-to-head, the division is clear: the Porsche 718 Spyder takes our 0-100 driving character grading, 84 against 88. Characteristic of the Mercedes-AMG C 63: Thunderous twin-turbo V8 with a playful, adjustable rear-drive character. For the Porsche 718 Spyder: Naturally-aspirated flat-six purity in an open-top mid-engined chassis. In outright terms it is 503 hp against 414 — a 89 hp gap — and the Mercedes-AMG C 63 reaches 60 mph 0.2s sooner.
Interior & Cabin: Mercedes-AMG C 63 vs Porsche 718 Spyder
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 cabin remains strictly driver-focused, with Alcantara accents on the contact points and a simplified dashboard layout that emphasises function over technology. Lightweight door pulls and minimal luxuries maintain the stripped-back, enthusiast spirit of the Spyder. Because of the manual roof mechanism, interior storage is at a premium, and the cabin environment can be quite noisy when the top is up. The seats are excellent for long-distance support, but the overall feeling is one of purposeful simplicity, catering to those who prefer the tactile interaction of a pure sports car over digital sophistication.
Head-to-head, the division is clear: the Mercedes-AMG C 63 takes our 0-100 interior & cabin grading, 76 against 62. Characteristic of the Mercedes-AMG C 63: Flamboyant, premium-feeling cabin with supportive seats. For the Porsche 718 Spyder: Motorsport-flavoured cabin with genuine everyday livability.
Daily Usability: Mercedes-AMG C 63 vs Porsche 718 Spyder
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.
As the lightest member of the 718 family, the Spyder is remarkably nimble in urban settings, though the manual roof operation requires significant effort and patience compared to power-operated rivals. The dual trunks—front and rear—provide decent storage for a weekend getaway, which remains its primary use case. The ride is firm, though manageable, and it lacks the daily convenience of power-folding roof mechanisms, reinforcing its role as a machine to be driven intentionally. It is not an ideal city car, but for the enthusiast driver, it offers the perfect balance of roadster freedom and mid-engine practicality.
Head-to-head, the division is clear: the Mercedes-AMG C 63 takes our 0-100 daily usability grading, 70 against 65. Characteristic of the Mercedes-AMG C 63: Comfortable, well-isolated cruiser despite its firm setup. For the Porsche 718 Spyder: Surprisingly civil for an open-top track-focused Porsche. that means 455 litres of boot space against 150, plus a usable front boot in the Porsche 718 Spyder, and everyday running costs that favour the Mercedes-AMG C 63 at the pumps.
Ownership: Mercedes-AMG C 63 vs Porsche 718 Spyder
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 the final naturally aspirated flat-six Boxster variant, the 718 Spyder holds a special place in the Porsche hierarchy, which has helped sustain strong residual values. Ownership is backed by the comprehensive Porsche dealer network, ensuring that maintenance is straightforward and well-documented. Parts and support for the 718 platform remain easy to obtain, though the limited production run means that Spyder-specific aesthetic components may become increasingly difficult to replace over time. It is a reliable, high-value ownership proposition that rewards careful maintenance and consistent usage throughout the warmer months of the year.
Head-to-head, the division is clear: the Porsche 718 Spyder takes our 0-100 ownership grading, 66 against 78. Characteristic of the Mercedes-AMG C 63: Feels robustly screwed together. For the Porsche 718 Spyder: Mechanically simple, Porsche-grade reliability. On the wallet the two diverge at £55,000 versus £80,000 — a £25,000 difference, with annual maintenance of £1,100 against £1,200, and warranty cover of 3yr / unlimited mi versus 4yr / 50k mi.