Mercedes-AMG SL 63 vs Porsche 911 Targa 4 GTS
Compare the Mercedes-AMG SL 63 vs Porsche 911 Targa 4 GTS. The Porsche 911 Targa 4 GTS is £20,000 cheaper. The Porsche 911 Targa 4 GTS is 0.2s quicker to 60mph. The Porsche 911 Targa 4 GTS is more fuel efficient. Full performance, cost & ownership breakdown.
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 Porsche 911 Targa 4 GTS is priced from £145,000, powered by a 3.0L Twin-Turbo Flat-6, producing 473 hp, with 570 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 offers a 213-litre boot, runs on petrol, returns around 24 mpg, is covered by a 3yr/unlimited mi warranty. The Porsche 911 Targa 4 GTS offers a 132-litre boot, a usable front boot, runs on petrol, returns around 26 mpg, is covered by a 4yr/50k mi warranty.
On cost of ownership, the Porsche 911 Targa 4 GTS is £20,000 cheaper than its rival, both require around £1,500 per year in maintenance, the Porsche 911 Targa 4 GTS is the more fuel-efficient choice, a full tank costs around £90 for the Mercedes-AMG SL 63 and £85 for the Porsche 911 Targa 4 GTS.
Driving Character: Mercedes-AMG SL 63 vs Porsche 911 Targa 4 GTS
Head-to-head, the division is clear: the Mercedes-AMG SL 63 — SL 63 AWD with active rear steering; more dynamic than SL predecessors; the Porsche 911 Targa 4 GTS — 473hp 3.0L Twin-Turbo Flat-6; AWD delivers strong, purposeful performance. Characteristic of the Mercedes-AMG SL 63: 577hp V8 with characteristic AMG torque delivery across the rev range. For the Porsche 911 Targa 4 GTS: AWD configuration shapes handling balance and traction character. In outright terms it is 577 hp against 473 — a 104 hp gap — and the Porsche 911 Targa 4 GTS reaches 60 mph 0.2s sooner.
Interior & Cabin: Mercedes-AMG SL 63 vs Porsche 911 Targa 4 GTS
Head-to-head, the division is clear: the Mercedes-AMG SL 63 — Soft-top roadster with genuine 2+2 rear seats returned to SL range; the Porsche 911 Targa 4 GTS — Porsche interior quality standards applied; driver-focused layout. Characteristic of the Mercedes-AMG SL 63: MBUX Hyperscreen available; most technology-forward SL interior ever. For the Porsche 911 Targa 4 GTS: Porsche materials and design language carried through comprehensively.
Daily Usability: Mercedes-AMG SL 63 vs Porsche 911 Targa 4 GTS
Head-to-head, the division is clear: the Mercedes-AMG SL 63 — Roof mechanism reliable and rapid; usable as open-top grand tourer; the Porsche 911 Targa 4 GTS — Performance character adapted for road-legal everyday use. Characteristic of the Mercedes-AMG SL 63: AWD enables year-round use in all climates; better versatility than predecessors. For the Porsche 911 Targa 4 GTS: Porsche provides good service and support infrastructure. that means 213 litres of boot space against 132, plus a usable front boot in the Porsche 911 Targa 4 GTS, and everyday running costs that favour the Porsche 911 Targa 4 GTS at the pumps.
Ownership: Mercedes-AMG SL 63 vs Porsche 911 Targa 4 GTS
Head-to-head, the division is clear: the Mercedes-AMG SL 63 — Mercedes SL has decades of reliability history; latest generation expected to continue; the Porsche 911 Targa 4 GTS — Porsche dealer network supports this model comprehensively. Characteristic of the Mercedes-AMG SL 63: Broad dealer network and long-running support programmes. For the Porsche 911 Targa 4 GTS: Residuals reflect market desirability and production volume. On the wallet the two diverge at £165,000 versus £145,000 — a £20,000 difference, and warranty cover of 3yr/unlimited mi versus 4yr/50k mi.