Mercedes-AMG C 63 vs Porsche 718 Cayman GT4
Compare the Mercedes-AMG C 63 vs Porsche 718 Cayman GT4. The Porsche 718 Cayman GT4 is £0 cheaper. The Mercedes-AMG C 63 is 0.4s 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 £78,000, 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 Cayman GT4 is priced from £65,000, powered by a 4.0L Flat-6, producing 414 hp, with 420 Nm of torque, reaching 0-60 mph in 4.2s, a top speed of 188 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 Cayman GT4 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 Cayman GT4 is £0 cheaper than its rival, both require around £1,100 per year in maintenance, 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 Cayman GT4.
Driving Character: Mercedes-AMG C 63 vs Porsche 718 Cayman GT4
Head-to-head, the division is clear: the Mercedes-AMG C 63 — New 2.0L hybrid replaces V8; controversial but 503hp available instantly; the Porsche 718 Cayman GT4 — 414hp 4.0L Flat-6; RWD delivers strong, purposeful performance. Characteristic of the Mercedes-AMG C 63: Four-wheel steering improves agility; sharper than previous generations. For the Porsche 718 Cayman GT4: RWD configuration shapes handling balance and traction character. In outright terms it is 503 hp against 414 — a 89 hp gap — and the Mercedes-AMG C 63 reaches 60 mph 0.4s sooner.
Interior & Cabin: Mercedes-AMG C 63 vs Porsche 718 Cayman GT4
Head-to-head, the division is clear: the Mercedes-AMG C 63 — Four-door format with AMG performance; accessible sports saloon in C-Class quality; the Porsche 718 Cayman GT4 — Porsche interior quality standards applied; driver-focused layout. Characteristic of the Mercedes-AMG C 63: MBUX system well implemented; large portrait touchscreen a highlight. For the Porsche 718 Cayman GT4: Porsche materials and design language carried through comprehensively.
Daily Usability: Mercedes-AMG C 63 vs Porsche 718 Cayman GT4
Head-to-head, the division is clear: the Mercedes-AMG C 63 — 455L boot excellent for the class; most practical car at this performance level; the Porsche 718 Cayman GT4 — Performance character adapted for road-legal everyday use. Characteristic of the Mercedes-AMG C 63: EV-only mode for urban driving; reduces fuel and noise in city. For the Porsche 718 Cayman GT4: Porsche provides good service and support infrastructure. that means 455 litres of boot space against 150, plus a usable front boot in the Porsche 718 Cayman GT4, and everyday running costs that favour the Mercedes-AMG C 63 at the pumps.
Ownership: Mercedes-AMG C 63 vs Porsche 718 Cayman GT4
Head-to-head, the division is clear: the Mercedes-AMG C 63 — Mercedes C-Class widest dealer network in this comparison; servicing very accessible; the Porsche 718 Cayman GT4 — Porsche dealer network supports this model comprehensively. Characteristic of the Mercedes-AMG C 63: Hybrid warranty coverage comprehensive; AMG support through full Mercedes network. For the Porsche 718 Cayman GT4: Residuals reflect market desirability and production volume. On the wallet the two diverge at £78,000 versus £65,000 — a £13,000 difference, and warranty cover of 3yr/unlimited mi versus 4yr/50k mi.