# Porsche 718 Cayman — Used Car Buying Guide

AutoScout's analysis of the Porsche 718 Cayman on the UK used-car market. Backed by 33 million DVSA MOT tests, current AutoTrader pricing, and depreciation curves derived from CAP/Glass's Guide data.

Live interactive report: https://autoscout.fyi/cars/porsche-718-cayman

## Verdict

- **Best value year**: 2021
- **Ideal trim**: 718 Cayman S
- **Target mileage**: 20,000–40,000 miles
- **Max previous owners**: 3
- **Target price**: £49,000

## Why this model

The Porsche 718 Cayman is a fantastic choice if you're looking for a pure driving experience. It offers incredible handling, a balanced chassis, and a surprisingly practical boot for a sports car. The build quality is top-notch, and it holds its value better than many rivals. It's a true driver's car that feels special every time you get behind the wheel.

## What you should pay

Based on the current UK market (February 2026), a well-maintained 2021 718 Cayman S with around 30,000 miles should be achievable for our target price. Prices have stabilised after some fluctuations, making it a good time to buy a used example. Expect to pay a premium for cars with desirable options like PDK, sports exhaust, or specific interior packages.

## Which trim to buy

The 718 Cayman S hits the sweet spot in the range. It offers a significant power bump over the base 2.0L model, making it much more engaging to drive, without the much higher price tag of the GTS 4.0. The 2.5L turbocharged engine in the S provides a great blend of performance and everyday usability, and it's generally seen as the best value for money in the lineup.

## What to check before you buy

- PDK transmission issues (rare but costly if they occur)
- Ignition coil failures (can lead to misfires)
- Water pump leaks (check for coolant leaks)
- Rapid brake and tyre wear (expected for a performance car, factor into running costs)
- Minor electrical gremlins (e.g., infotainment glitches)

## Running costs

Running a 718 Cayman S isn't cheap, but it's manageable for a performance car. Fuel costs will be around £0.215 per mile based on 31.7 mpg and current petrol prices. Road tax (VED) for a 2021 model with a new list price over £40,000 will be £600 per year for the first 5 years, then £190 annually. Insurance will be significant, likely in the £800-£1,500+ range depending on your age, location, and no-claims bonus. Servicing at a Porsche specialist or main dealer will also be more expensive than a regular car, so budget £500-£1,000 annually for routine maintenance.

## Key stats

- **Fuel Type**: Petrol
- **Horsepower**: 350 hp (for S model)
- **Mpg**: Around 31.7 mpg (WLTP combined)
- **Reliability Score**: Above average for a sports car, but maintenance can be premium priced.
- **Safety Rating**: Not rated by Euro NCAP

## Trim comparison

| Trim | Price new | Price used | Key features |
| --- | --- | --- | --- |
| 718 Cayman | £45,000 | £42,000 | 2.0L Turbocharged Flat-Four Engine (300 hp); 18-inch Alloy Wheels; Bi-Xenon Headlights |
| 718 Cayman S | £55,000 | £49,000 | 2.5L Turbocharged Flat-Four Engine (350 hp); 19-inch Alloy Wheels; Larger Brake Discs |
| 718 Cayman GTS | £65,000 | £58,000 | 2.5L Turbocharged Flat-Four Engine (365 hp); 20-inch Satin Black Alloy Wheels; Sport Design Package |

## Depreciation forecast

| Year | Estimated value | Retention |
| --- | --- | --- |
| 2026 | £49,000 | 0% |
| 2027 | £46,000 | 6.1% |
| 2028 | £43,500 | 11.1% |
| 2029 | £41,500 | 15.3% |
| 2030 | £39,800 | 18.7% |

The 718 Cayman, especially the S model, holds its value remarkably well for a sports car. Buying a 3-4 year old model means you're past the steepest part of the depreciation curve. While it will continue to lose value, the percentage loss year-on-year becomes more gradual, making it a relatively stable investment in the used performance car market.

Total value lost since new: 18.7%.

## Alternatives to consider

- [Alpine A110](https://autoscout.fyi/cars/alpine-a110.md)
- BMW M2 (F87 generation)
- Audi TT RS

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Source: AutoScout (https://autoscout.fyi). Part of a review of the UK used-car market across 500+ models.