Audi TT RS Coupé vs Porsche 718 Cayman GT4 RS
Compare the Audi TT RS Coupé vs Porsche 718 Cayman GT4 RS. The Audi TT RS Coupé is £56,000 cheaper. The Porsche 718 Cayman GT4 RS is 0.3s 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 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 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 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 TT RS Coupé is £56,000 cheaper than its rival, the Audi TT RS Coupé costs less in annual maintenance (£1,000 versus £1,300), 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 RS.
Driving Character: Audi TT RS Coupé vs Porsche 718 Cayman GT4 RS
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 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, 76 against 96. Characteristic of the Audi TT RS Coupé: Charismatic five-cylinder soundtrack with tenacious quattro grip. For the Porsche 718 Cayman GT4 RS: GT3-derived engine in the lightest, most track-focused Cayman ever. In outright terms it is 394 hp against 493 — a 99 hp gap — and the Porsche 718 Cayman GT4 RS reaches 60 mph 0.3s sooner.
Interior & Cabin: Audi TT RS Coupé vs Porsche 718 Cayman GT4 RS
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 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 TT RS Coupé takes our 0-100 interior & cabin grading, 78 against 50. Characteristic of the Audi TT RS Coupé: Compact, well-built cabin with typical Audi ergonomics. For the Porsche 718 Cayman GT4 RS: Stripped-back, motorsport-focused cockpit.
Daily Usability: Audi TT RS Coupé vs Porsche 718 Cayman GT4 RS
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.
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 TT RS Coupé takes our 0-100 daily usability grading, 80 against 35. Characteristic of the Audi TT RS Coupé: Genuinely usable small performance coupe for daily driving. For the Porsche 718 Cayman GT4 RS: Usable but clearly built for track days over commuting. that means 305 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 TT RS Coupé at the pumps.
Ownership: Audi TT RS Coupé vs Porsche 718 Cayman GT4 RS
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.
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 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 RS: Mechanically simple, Porsche-grade reliability. On the wallet the two diverge at £38,000 versus £115,000 — a £77,000 difference, with annual maintenance of £1,000 against £1,300, and warranty cover of 3yr / unlimited mi versus 4yr / 50k mi.