Porsche 718 Cayman GT4 vs Audi RS7
Compare the Porsche 718 Cayman GT4 vs Audi RS7. The Porsche 718 Cayman GT4 is £27,000 cheaper. The Audi RS7 is 0.7s quicker to 60mph. The Porsche 718 Cayman GT4 is more fuel efficient. Full performance, cost & ownership breakdown.
The Porsche 718 Cayman GT4 is priced from £84,000, 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 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 offers a 150-litre boot, a usable front boot, runs on petrol, returns around 25 mpg, is covered by a 4yr / 50k mi warranty. 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.
On cost of ownership, the Porsche 718 Cayman GT4 is £27,000 cheaper than its rival, the Porsche 718 Cayman GT4 costs less in annual maintenance (£1,100 versus £1,200), the Porsche 718 Cayman GT4 is the more fuel-efficient choice, a full tank costs around £70 for the Porsche 718 Cayman GT4 and £90 for the Audi RS7.
Driving Character: Porsche 718 Cayman GT4 vs Audi RS7
The Porsche 718 Cayman GT4 is the definition of chassis purity, pairing a naturally aspirated 4.0-litre flat-six with a mid-engine layout that offers near-perfect neutrality. The 414hp delivery is linear and predictable, allowing for precise throttle modulation through technical sections of track. The manual gearbox is a highlight, featuring short, mechanical throws that engage the driver completely. While it lacks the raw top-end speed of 911-based variants, the balanced chassis and communicative steering allow it to carry immense cornering speed, making it an exceptionally rewarding tool for those who value driver input over outright power figures.
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.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 takes our 0-100 driving character grading, 93 against 75. Characteristic of the Porsche 718 Cayman GT4: Purist mid-engined chassis balance and involvement. For the Audi RS7: Effortless, quattro-assured pace in a genuinely luxurious package. In outright terms it is 414 hp against 591 — a 177 hp gap — and the Audi RS7 reaches 60 mph 0.7s sooner.
Interior & Cabin: Porsche 718 Cayman GT4 vs Audi RS7
The cabin prioritises function, stripping away unnecessary luxuries in favour of an Alcantara-lined environment that feels race-ready. The Sport Seats Plus provide excellent lateral support during spirited driving, while the minimalist dashboard design ensures the focus remains entirely on the road ahead. Given its track-focused intent, the cabin storage is sparse and the rear seating area is replaced by a structural strut brace. It is a clean, purposeful space, though some may find the lack of comfort-oriented features a challenge for long-distance touring, fitting perfectly with the model's lightweight, enthusiast-oriented persona.
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.
Head-to-head, the division is clear: the Audi RS7 takes our 0-100 interior & cabin grading, 55 against 88. Characteristic of the Porsche 718 Cayman GT4: Motorsport-flavoured cabin with genuine everyday livability. For the Audi RS7: Spacious, premium cabin with excellent tech and comfort.
Daily Usability: Porsche 718 Cayman GT4 vs Audi RS7
Utility is a standout feature, as the combination of front and rear trunks allows for surprising storage capacity, making the GT4 a versatile choice for weekend touring. Its compact dimensions make it relatively easy to navigate through tight city streets, although the low front splitter demands care over speed bumps and steep inclines. The suspension is firm, bordering on harsh for daily use in Sport mode, though it remains composed enough for the committed driver. It manages to balance track-ready performance with sufficient real-world practicality, provided the owner is prepared for a more rigorous ride quality.
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.
Head-to-head, the division is clear: the Audi RS7 takes our 0-100 daily usability grading, 68 against 82. Characteristic of the Porsche 718 Cayman GT4: Surprisingly civil ride and quiet cabin for a track-focused car. For the Audi RS7: A genuine luxury daily driver with supercar-embarrassing pace. that means 150 litres of boot space against 535, plus a usable front boot in the Porsche 718 Cayman GT4, and everyday running costs that favour the Porsche 718 Cayman GT4 at the pumps.
Ownership: Porsche 718 Cayman GT4 vs Audi RS7
Porsche ownership provides a reliable and extensive dealer network, ensuring that the Cayman GT4 is well-supported throughout its life. As a naturally aspirated model, the GT4 has retained significant residual value, making it a sound financial proposition for enthusiasts. Servicing intervals are well-defined, and while specific GT4 components might require longer lead times, the mechanical robustness of the 4.0-litre engine offers peace of mind. It remains a model with a dedicated community and strong factory support, ensuring that this iteration of the Cayman will remain a coveted machine for years to come.
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.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 takes our 0-100 ownership grading, 78 against 75. Characteristic of the Porsche 718 Cayman GT4: Mechanically simple, Porsche-grade reliability. For the Audi RS7: Strong owner-reported reliability (4.7/5 per KBB after 50k miles). On the wallet the two diverge at £84,000 versus £105,000 — a £21,000 difference, with annual maintenance of £1,100 against £1,200, and warranty cover of 4yr / 50k mi versus 3yr / unlimited mi.