Audi TT RS Coupé vs Porsche 718 Cayman GT4
Compare the Audi TT RS Coupé vs Porsche 718 Cayman GT4. The Audi TT RS Coupé is £26,000 cheaper. The Audi TT RS Coupé is 0.5s quicker to 60mph. The Audi TT RS Coupé is more fuel efficient. Full performance, cost & ownership breakdown.
The Audi TT RS Coupé is priced from £38,000, powered by a 2.5L Turbo I5, producing 394 hp, with 480 Nm of torque, reaching 0-60 mph in 3.7s, a top speed of 174 mph, sent to the road via all-wheel drive. 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 TT RS Coupé offers a 305-litre boot, folding rear seats, runs on petrol, returns around 32 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 Audi TT RS Coupé is £26,000 cheaper than its rival, the Audi TT RS Coupé costs less in annual maintenance (£1,000 versus £1,100), the Audi TT RS Coupé is the more fuel-efficient choice, a full tank costs around £72 for the Audi TT RS Coupé and £70 for the Porsche 718 Cayman GT4.
Driving Character: Audi TT RS Coupé vs Porsche 718 Cayman GT4
The TT RS is defined by its 2.5L five-cylinder engine, a characterful powerhouse that delivers 394 hp and a distinctive, off-beat exhaust note. Paired with Quattro AWD and magnetic ride control, it offers a compact, highly focused sports car experience that is as exciting as it is precise. The turn-in is sharp, and the grip levels are immense, allowing the car to punch out of corners with genuine urgency. While there is a hint of turbo lag at lower revs, the engine’s willingness to climb through the range ensures that the driving experience remains consistently engaging and punchy.
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.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 takes our 0-100 driving character grading, 76 against 93. Characteristic of the Audi TT RS Coupé: Charismatic five-cylinder soundtrack with tenacious quattro grip. For the Porsche 718 Cayman GT4: Purist mid-engined chassis balance and involvement. In outright terms it is 394 hp against 414 — a 20 hp gap — and the Audi TT RS Coupé reaches 60 mph 0.5s sooner.
Interior & Cabin: Audi TT RS Coupé vs Porsche 718 Cayman GT4
Inside, the TT RS is a masterclass in driver-centric design. The cabin is compact, stripping away unnecessary clutter to focus on the essential driving experience. The Virtual Cockpit remains a highlight, offering customisable RS-specific displays that keep the driver fully informed without requiring them to glance away from the road. Audi’s choice of materials is excellent, with high-quality finishes and supportive sports seats standard. While the rear seats are vestigial and only suitable for luggage or very occasional use, the cockpit itself feels perfectly tailored for the enthusiast, reinforcing the car’s focused intent.
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.
Head-to-head, the division is clear: the Audi TT RS Coupé takes our 0-100 interior & cabin grading, 78 against 55. Characteristic of the Audi TT RS Coupé: Compact, well-built cabin with typical Audi ergonomics. For the Porsche 718 Cayman GT4: Motorsport-flavoured cabin with genuine everyday livability.
Daily Usability: Audi TT RS Coupé vs Porsche 718 Cayman GT4
For a performance coupe, the TT RS is surprisingly usable in day-to-day conditions. Its compact footprint makes navigating busy urban centres a breeze, and parking is rarely a source of stress compared to larger performance cars. The 305L boot space is adequate for a weekend getaway, provided one packs efficiently. While the ride can be firm in Sport mode, it is easily moderated for more comfortable daily driving. The primary challenge is limited rear visibility due to the small rear window and the low roofline, which demands a more observant approach when navigating complex junctions.
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.
Head-to-head, the division is clear: the Audi TT RS Coupé takes our 0-100 daily usability grading, 80 against 68. Characteristic of the Audi TT RS Coupé: Genuinely usable small performance coupe for daily driving. For the Porsche 718 Cayman GT4: Surprisingly civil ride and quiet cabin for a track-focused car. that means 305 litres of boot space against 150, plus a usable front boot in the Porsche 718 Cayman GT4, and everyday running costs that favour the Audi TT RS Coupé at the pumps.
Ownership: Audi TT RS Coupé vs Porsche 718 Cayman GT4
Owning a TT RS is a unique proposition, especially now that production has concluded. The five-cylinder engine is well-supported by Audi’s dealer network, but as the model ages, specific TT-related components may become harder to source. Enthusiast interest in the final iteration of this legendary powertrain keeps residual values strong, making it a potentially savvy long-term purchase. Maintenance costs are reasonable for the performance class, and the car's fuel economy is better than many rivals. It is a machine that rewards its owner with an emotive, character-filled experience that is becoming increasingly rare in the automotive world.
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.
Head-to-head, the division is clear: the Audi TT RS Coupé takes our 0-100 ownership grading, 80 against 78. Characteristic of the Audi TT RS Coupé: Strong reliability reputation, now discontinued and adding to appeal. For the Porsche 718 Cayman GT4: Mechanically simple, Porsche-grade reliability. On the wallet the two diverge at £38,000 versus £84,000 — a £46,000 difference, with annual maintenance of £1,000 against £1,100, and warranty cover of 3yr / unlimited mi versus 4yr / 50k mi.