Audi RS7 vs Porsche 718 Cayman GT4 RS
Compare the Audi RS7 vs Porsche 718 Cayman GT4 RS. The Audi RS7 is £3,000 cheaper. The Porsche 718 Cayman GT4 RS is 0.1s quicker to 60mph. The Audi RS7 is more fuel efficient. Full performance, cost & ownership breakdown.
The Audi RS7 is priced from £105,000, powered by a 4.0L Twin-Turbo V8, producing 591 hp, with 800 Nm of torque, reaching 0-60 mph in 3.5s, a top speed of 190 mph, sent to the road via all-wheel drive. The Porsche 718 Cayman GT4 RS is priced from £115,000, 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 Audi RS7 offers a 535-litre boot, folding rear seats, runs on petrol, returns around 24 mpg, is covered by a 3yr / unlimited mi warranty. The Porsche 718 Cayman GT4 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.
On cost of ownership, the Audi RS7 is £3,000 cheaper than its rival, the Audi RS7 costs less in annual maintenance (£1,200 versus £1,300), the Audi RS7 is the more fuel-efficient choice, a full tank costs around £90 for the Audi RS7 and £70 for the Porsche 718 Cayman GT4 RS.
Driving Character: Audi RS7 vs Porsche 718 Cayman GT4 RS
The RS7 occupies a unique space, marrying the brutal acceleration of a 4.0L twin-turbo V8 with the visual drama of a low-slung, sweeping Sportback. With 591 hp and the advanced Quattro system, it delivers devastating straight-line performance that feels relentless and almost telepathic. All-wheel steering is standard, giving this imposing car an agility that defies its substantial weight in the corners. It is a machine designed for covering vast distances at high speed with effortless ease, providing a level of poise that turns even the most demanding road into a manageable ribbon of asphalt.
The Porsche 718 Cayman GT4 RS represents the apex of the 718 platform, transplanting a 493hp naturally aspirated flat-six from the GT3 into a mid-engine chassis. The result is a machine with staggering agility and a turn-in response that makes even the standard GT4 feel soft. The chassis balance is dominated by rear-end grip and sharp, responsive steering that provides constant feedback. It is an extreme instrument, demanding a high level of expertise to truly extract its full potential. The power delivery is frenetic, culminating in a high-revving wail that defines the car's racing-inspired character.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 RS takes our 0-100 driving character grading, 75 against 96. Characteristic of the Audi RS7: Effortless, quattro-assured pace in a genuinely luxurious package. For the Porsche 718 Cayman GT4 RS: GT3-derived engine in the lightest, most track-focused Cayman ever. In outright terms it is 591 hp against 493 — a 98 hp gap — and the Porsche 718 Cayman GT4 RS reaches 60 mph 0.1s sooner.
Interior & Cabin: Audi RS7 vs Porsche 718 Cayman GT4 RS
The interior is a high-luxury environment, mirroring the technical sophistication of the RS6 but packaged within a more dramatic, coupe-like frame. The Virtual Cockpit Plus provides clear, customisable readouts, while the cabin's materials—ranging from carbon fibre to Valcona leather—exude a premium, tactile quality. Because of the raked roofline, the rear cabin feels more intimate than in the Avant version, sacrificing headroom for a more sporting aesthetic. It is undeniably a driver’s cabin, where every control feels weighted, precise, and purposefully placed to enhance the feeling of being in something truly exclusive.
The interior is a study in weight reduction, featuring CFRP door panels, lightweight door pulls, and carbon bucket seats that lock the driver in place. The presence of the standard roll bar behind the seats signals its intent, creating a sparse, motorsport-focused atmosphere. Sound deadening is intentionally minimal, allowing the mechanical symphony—and the roar of the intake located just behind the driver's head—to flood the cabin. It is not designed for luxury or comfort, but rather as an extension of the driving experience, prioritising tactical feedback and material efficiency above all else.
Head-to-head, the division is clear: the Audi RS7 takes our 0-100 interior & cabin grading, 88 against 50. Characteristic of the Audi RS7: Spacious, premium cabin with excellent tech and comfort. For the Porsche 718 Cayman GT4 RS: Stripped-back, motorsport-focused cockpit.
Daily Usability: Audi RS7 vs Porsche 718 Cayman GT4 RS
While the RS7 is undoubtedly a performance vehicle, its Sportback design offers a practical twist. The 535L boot is more than sufficient for typical weekend trips, and the lift-back opening makes loading gear straightforward. Urban use requires awareness; its significant width and low stance mean care is needed in narrow parking structures, though the array of sensors and cameras makes it doable. In Comfort mode, the air suspension does a commendable job of masking road surface harshness, ensuring that urban traffic or motorway cruising is conducted with a sense of refined, whisper-quiet calm.
Daily utility is significantly compromised by the track-oriented nature of the GT4 RS. The suspension is exceptionally firm, making it punishing on all but the smoothest road surfaces, and the lack of sound insulation makes it unsuitable for long, tedious commutes. Despite this, the front and rear trunks remain available for storage, and the inclusion of a front-axle lift system helps navigate urban obstacles. While it is technically possible to drive to the track, the RS experience is best reserved for spirited road use or dedicated circuit days rather than routine errands.
Head-to-head, the division is clear: the Audi RS7 takes our 0-100 daily usability grading, 82 against 35. Characteristic of the Audi RS7: A genuine luxury daily driver with supercar-embarrassing pace. For the Porsche 718 Cayman GT4 RS: Usable but clearly built for track days over commuting. that means 535 litres of boot space against 125, plus a usable front boot in the Porsche 718 Cayman GT4 RS, and everyday running costs that favour the Audi RS7 at the pumps.
Ownership: Audi RS7 vs Porsche 718 Cayman GT4 RS
As a flagship performance model, the RS7 commands a premium in terms of running costs. Fuel consumption is consistent with a high-output V8, and the long-term maintenance requires a dedicated budget for tyres, brakes, and scheduled service checks. Audi’s dealer network ensures that this level of care is easily accessible, and the car's desirable styling keeps residual values firm amongst performance-oriented buyers. It is a car that demands a commitment to its upkeep, but in exchange, it offers an ownership experience defined by style, speed, and the confidence that comes with a top-tier automotive engineering product.
Owning a 718 Cayman GT4 RS is a high-stakes proposition, with high purchase prices and significant service costs reflecting its status as a low-volume, specialised performance vehicle. Values have appreciated rapidly, as the model occupies a unique space in the modern Porsche lineup. Owners benefit from the comprehensive Porsche Motorsport support network, which is essential for managing RS-specific components that are more expensive and harder to source than standard parts. It is a collector's dream, provided the owner acknowledges the substantial overheads and the demanding nature of maintaining a high-performance track machine.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 RS takes our 0-100 ownership grading, 75 against 78. Characteristic of the Audi RS7: Strong owner-reported reliability (4.7/5 per KBB after 50k miles). For the Porsche 718 Cayman GT4 RS: Mechanically simple, Porsche-grade reliability. On the wallet the two diverge at £105,000 versus £115,000 — a £10,000 difference, with annual maintenance of £1,200 against £1,300, and warranty cover of 3yr / unlimited mi versus 4yr / 50k mi.