Mercedes-AMG ONE vs Porsche 918 Spyder
Compare the Mercedes-AMG ONE vs Porsche 918 Spyder. The Porsche 918 Spyder is £1,620,000 cheaper. The Porsche 918 Spyder is 0.4s quicker to 60mph. The Porsche 918 Spyder is more fuel efficient. Full performance, cost & ownership breakdown.
The Mercedes-AMG ONE is priced from £3,500,000, powered by a 1.6L V6 Hybrid, producing 1049 hp, with 900 Nm of torque, reaching 0-60 mph in 2.9s, a top speed of 219 mph, sent to the road via all-wheel drive. The Porsche 918 Spyder is priced from £1,400,000, powered by a 4.6L V8 Hybrid, producing 887 hp, with 1280 Nm of torque, reaching 0-60 mph in 2.5s, a top speed of 214 mph, sent to the road via all-wheel drive.
The Mercedes-AMG ONE offers a 130-litre boot, runs on petrol hybrid, returns around 45 mpg, is covered by a 2yr / unlimited mi warranty. The Porsche 918 Spyder offers a 115-litre boot, runs on petrol hybrid, returns around 94 mpg, is covered by a 2yr / unlimited mi warranty.
On cost of ownership, the Porsche 918 Spyder is £1,620,000 cheaper than its rival, the Porsche 918 Spyder costs less in annual maintenance (£8,000 versus £4,000), the Porsche 918 Spyder is the more fuel-efficient choice, a full tank costs around £60 for the Mercedes-AMG ONE and £80 for the Porsche 918 Spyder.
Driving Character: Mercedes-AMG ONE vs Porsche 918 Spyder
The Mercedes-AMG ONE is a staggering achievement, packing a 1049 hp hybrid V6 directly descended from Formula One. It pulls with relentless intensity, climbing to a dizzying 11,000rpm redline that makes every other road car feel pedestrian. With all-wheel drive and active aero, it provides grip levels that defy physics, yet the chassis is complex and demanding, requiring a bespoke, F1-inspired suspension setup to manage its immense power. It is not built for comfort; this is a track-focused machine where every component serves the pursuit of raw, unadulterated speed.
The Porsche 918 Spyder is a technological tour de force, pairing a high-revving 4.6L V8 with two electric motors for seamless, instant torque. Its AWD system and torque vectoring allow for incredible corner exit speeds, while top-exit exhausts facilitate unique aerodynamic efficiency. However, the complex hybrid system adds significant kerb weight, and the car's personality shifts dramatically between its various driving modes, requiring constant recalibration from the driver.
Head-to-head, the division is clear: the Mercedes-AMG ONE takes our 0-100 driving character grading, 97 against 94. Characteristic of the Mercedes-AMG ONE: A genuine Formula 1 power unit for the road - utterly unique and uncompromising. For the Porsche 918 Spyder: Trailblazing hybrid hypercar with genuinely accessible, confidence-inspiring performance. In outright terms it is 1049 hp against 887 — a 162 hp gap — and the Porsche 918 Spyder reaches 60 mph 0.4s sooner.
Interior & Cabin: Mercedes-AMG ONE vs Porsche 918 Spyder
Stepping into the Mercedes-AMG ONE requires a level of agility that mirrors its performance. The cabin is an impossibly compact space, heavily influenced by its racing bloodline, featuring carbon fibre and Alcantara at every turn. Bespoke AMG detailing separates it from any standard luxury vehicle, with focused digital displays providing all necessary telemetry. Ergonomics are entirely dedicated to the pilot, prioritising the driving position above all else. While the build quality is superlative, the interior prioritises function over features, maintaining a minimalist, performance-oriented aesthetic that emphasises the car's singular purpose.
Inside, the cockpit is defined by a minimalist, floating dashboard layout that prioritises focus over opulence. The Weissach package enhances the experience by integrating carbon fibre elements and lightweight magnesium wheels. Despite the high-tech interior, the cabin remains tight, featuring fixed-back bucket seats that offer minimal adjustment, making it less comfortable for long-duration drives than traditional grand tourers.
Head-to-head, the division is clear: the Porsche 918 Spyder takes our 0-100 interior & cabin grading, 55 against 68. Characteristic of the Mercedes-AMG ONE: F1-inspired cockpit with a genuinely road-legal (if extreme) driving position. For the Porsche 918 Spyder: Well-finished, motorsport-flavoured cockpit with genuine road usability.
Daily Usability: Mercedes-AMG ONE vs Porsche 918 Spyder
Utility is not a concept the Mercedes-AMG ONE recognises, as it offers virtually no luggage space for the driver or passenger. While the car features an EV-only mode that allows for quiet urban transit, it remains a difficult vehicle to navigate in everyday environments. The standard nose lift is an essential feature, preventing the aggressive splitter from fouling on mundane driveways. While the car is surprisingly manageable during low-speed manoeuvres, it is strictly an exotic machine designed for special occasions, never for the rigours of the daily grind.
Thanks to its dedicated EV-only mode, the 918 Spyder allows for surprisingly civilised, silent urban transit. It is arguably more practical than its direct hypercar rivals, boasting a useful front trunk for small items. Nevertheless, the exceptionally low ride height and substantial width make navigating speed bumps and multi-storey car parks a cautious endeavour, requiring significant driver awareness in everyday environments.
Head-to-head, the division is clear: the Porsche 918 Spyder takes our 0-100 daily usability grading, 20 against 40. Characteristic of the Mercedes-AMG ONE: Barely usable on the road - engine warm-up and complexity limit daily use. For the Porsche 918 Spyder: More usable than most hypercars thanks to genuine EV-only running. that means 130 litres of boot space against 115, and everyday running costs that favour the Porsche 918 Spyder at the pumps.
Ownership: Mercedes-AMG ONE vs Porsche 918 Spyder
Ownership of the Mercedes-AMG ONE is an exclusive privilege limited to 275 individuals. The reliance on a highly tuned F1 engine brings unique logistical demands, specifically the need for an engine rebuild every 50,000km, which carries an immense cost. Mercedes-AMG provides a dedicated team of specialists to support these vehicles, ensuring the level of maintenance matches the car's extreme engineering. Given the limited production run and the sheer technical audacity of the project, residual values remain stratospheric, cementing the car's status as a crown jewel in any serious collector's garage.
As a collector-grade investment, the 918 Spyder has seen values appreciate significantly since its departure from production. Porsche provides comprehensive factory support for its hybrid technology, including a robust battery service guarantee. However, ownership costs remain substantial; the technical complexity of the hybrid system mandates specialist intervention, and eventual battery replacement represents a major financial consideration for long-term custodians.
Head-to-head, the division is clear: the Porsche 918 Spyder takes our 0-100 ownership grading, 80 against 82. Characteristic of the Mercedes-AMG ONE: The most technically extraordinary hypercar of its generation. For the Porsche 918 Spyder: One of the most technically significant, sought-after modern hypercars. On the wallet the two diverge at £3,500,000 versus £1,400,000 — a £2,100,000 difference, with annual maintenance of £8,000 against £4,000.