Porsche 718 Cayman GT4 RS vs McLaren 765LT
Compare the Porsche 718 Cayman GT4 RS vs McLaren 765LT. The Porsche 718 Cayman GT4 RS is £202,000 cheaper. The McLaren 765LT is 0.7s quicker to 60mph. The Porsche 718 Cayman GT4 RS is more fuel efficient. Full performance, cost & ownership breakdown.
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 McLaren 765LT is priced from £350,000, powered by a 4.0L Twin-Turbo V8, producing 755 hp, with 800 Nm of torque, reaching 0-60 mph in 2.7s, a top speed of 205 mph, sent to the road via rear-wheel drive.
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. The McLaren 765LT offers a 150-litre boot, a usable front boot, runs on petrol, returns around 21 mpg, is covered by a 3yr / unlimited mi warranty.
On cost of ownership, the Porsche 718 Cayman GT4 RS is £202,000 cheaper than its rival, the Porsche 718 Cayman GT4 RS costs less in annual maintenance (£1,300 versus £3,200), the Porsche 718 Cayman GT4 RS is the more fuel-efficient choice, a full tank costs around £70 for the Porsche 718 Cayman GT4 RS and £80 for the McLaren 765LT.
Driving Character: Porsche 718 Cayman GT4 RS vs McLaren 765LT
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.
The McLaren 765LT is a visceral exercise in weight reduction and aerodynamic precision, stripping back the Sports Series to its purest form. With a 755 hp twin-turbo V8 and a kerb weight of just 2709 lbs, it delivers a 0-60 sprint of 2.7 seconds. The chassis is significantly stiffer than the 720S, providing a track-oriented platform that communicates every pebble through the steering rack. Its unique top-exit exhaust system adds a raw, aggressive soundtrack, though the aggressive gearshifts and stiff springs ensure the car is perpetually on edge, demanding absolute focus from the driver on every public road.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 RS takes our 0-100 driving character grading, 96 against 96. Characteristic of the Porsche 718 Cayman GT4 RS: GT3-derived engine in the lightest, most track-focused Cayman ever. For the McLaren 765LT: The most extreme, track-derived McLaren Longtail - razor-sharp and uncompromising. In outright terms it is 493 hp against 755 — a 262 hp gap — and the McLaren 765LT reaches 60 mph 0.7s sooner.
Interior & Cabin: Porsche 718 Cayman GT4 RS vs McLaren 765LT
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.
The interior of the 765LT is decidedly Spartan, prioritising the removal of excess mass over creature comforts. Lightweight carbon fibre bucket seats and stripped-back door panels define the cabin, with Alcantara surfaces replacing traditional materials to save every possible gram. While the interface is functional, it feels archaic in the face of current market standards, yet few drivers will care when surrounded by such focused, motorsport-grade architecture. The lack of heavy sound-deadening material ensures the cabin is a loud, busy environment, but it effectively underscores the car's intent as a track-day weapon repurposed for the road.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 RS takes our 0-100 interior & cabin grading, 50 against 50. Characteristic of the Porsche 718 Cayman GT4 RS: Stripped-back, motorsport-focused cockpit. For the McLaren 765LT: Stripped-back, motorsport-focused cockpit.
Daily Usability: Porsche 718 Cayman GT4 RS vs McLaren 765LT
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.
Usability takes a backseat in the 765LT, yet it remains surprisingly capable for the occasional cross-country blast. The front lift system is a mandatory inclusion for navigating urban infrastructure, given the car's ultra-low front splitter and aggressive side skirts. Luggage space is limited to a 150-litre capacity that is mostly consumed by the necessities of track days rather than grand touring. Ingress and egress require a certain level of physical agility, as the carbon monocoque sills are exceptionally wide. It is not designed for daily commuting, but as a weekend escape machine, it serves its specific purpose admirably.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 RS takes our 0-100 daily usability grading, 35 against 30. Characteristic of the Porsche 718 Cayman GT4 RS: Usable but clearly built for track days over commuting. For the McLaren 765LT: Built for track days, not commuting. that means 125 litres of boot space against 150, and everyday running costs that favour the Porsche 718 Cayman GT4 RS at the pumps.
Ownership: Porsche 718 Cayman GT4 RS vs McLaren 765LT
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.
Ownership of the 765LT is a premium proposition, with annual maintenance reaching £3,200 due to the bespoke nature of its Longtail components. While the 3-year unlimited mileage warranty provides a safety net, the high-performance demands on the powertrain require diligent servicing. Collector interest in the Longtail badge has kept residual values exceptionally high, often exceeding the initial purchase price of £310,000 in the used market. It is a specialist vehicle for the dedicated enthusiast, where the cost of entry and maintenance is secondary to the unique, raw performance experience that only a limited-run McLaren can provide.
Head-to-head, the division is clear: the Porsche 718 Cayman GT4 RS takes our 0-100 ownership grading, 78 against 78. Characteristic of the Porsche 718 Cayman GT4 RS: Mechanically simple, Porsche-grade reliability. For the McLaren 765LT: Instant collector status as a limited-run 'Longtail' McLaren. On the wallet the two diverge at £115,000 versus £350,000 — a £235,000 difference, with annual maintenance of £1,300 against £3,200, and warranty cover of 4yr / 50k mi versus 3yr / unlimited mi.