2018 Porsche 718 Cayman 2.5 GTS

Overview

• Make: Porsche
• Model: 718 Cayman
• Trim: GTS
• Version: 2.5 GTS PDK RWD Euro 6 2dr (359 bhp)
• Year: 2018
• Mileage: 34,350 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 2 seats
• Engine: 2.5 litres, 359 bhp
• Gearbox: Automatic (PDK)
• Drive: Rear-wheel drive
• Colour: Silver
• CO2: 209 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Porsche 718 Cayman Gts has covered 34,350 miles, around 5,000 fewer miles than is typical for its age. The AskCar estimate for this car is £49,143. It is priced at £47,950, which is £1,193 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 314 Porsche 718 Cayman cars across different ages and specifications. We have tracked this advert for 6 days. Its advertised mileage matches the government's MOT record. The seller is H.R. Owen Specialist Cars Cheltenham, based in Cheltenham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 7 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,193 (2%) under the AskCar estimate of £49,143.

The AskCar estimate is our expected asking price for this car. It uses UK dealer asking prices, accounting for make, model, trim, version, age, mileage, fuel, gearbox, body type, driven wheels, engine size and power. It is an advertised price, not a confirmed sale price.

It draws on 314 priced Porsche 718 Cayman adverts across different ages and specifications, as of 7 November 2026.

A 2018 Porsche 718 Cayman with the 2.5 petrol engine is typically advertised at £45,000: the median of the 30 for sale on AskCar, as of 7 November 2026.

Time on sale

AskCar first saw this 2018 Porsche 718 Cayman advertised 6 days ago. About half of 2018 Porsche 718 Cayman cars are gone from sale within a month of being advertised: 28 of the 59 first advertised between 11 July 2026 and 4 October 2026.

Price history

AskCar first saw this advert on 1 November 2026 at £47,950. Its asking price has not changed.

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 7 November 2026: valid until 26 August 2027.

It has had 8 MOTs. The latest, on 24 August 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 33,759 miles, which matches the advertised 34,350 miles.

Advertised mileage is about 5,000 miles lower than the median mileage of a 2018 Porsche 718 Cayman on AskCar.

Similar cars

13 other 2018 Porsche 718 Cayman GTS 2.5 petrol automatic coupes are for sale at UK dealers, from £38,950 to £59,999, as of 7 November 2026.

The 3 closest to this car in mileage:

• 2018 Porsche 718 Cayman GTS, 2.5 petrol coupe, silver. Mileage: 39,383 miles. Price: £48,495, £545 more than this car. Dealer: Maybury Car Sales in Edinburgh. AskCar page: https://askcar.co.uk/car/porsche-718-cayman-2018-edea743dfa6a
• 2018 Porsche 718 Cayman GTS, 2.5 petrol coupe, white. Mileage: 27,000 miles. Price: £53,000, £5,050 more than this car. Dealer: Rsj Sports Cars in Slough. AskCar page: https://askcar.co.uk/car/porsche-718-cayman-2018-3645af0c0fc4
• 2018 Porsche 718 Cayman GTS, 2.5 petrol coupe, black. Mileage: 26,000 miles. Price: £49,995, £2,045 more than this car. Dealer: Peter Nash Specialist Cars in Southampton. AskCar page: https://askcar.co.uk/car/porsche-718-cayman-2018-f9dc8e473a19

• The nearest: 2018 Porsche 718 Cayman GTS, 2.5 petrol coupe, blue, 70 miles from this car. Mileage: 24,000 miles. Price: £44,995, £2,955 less than this car. Dealer: Ace Prestige in Chalfont St Peter. AskCar page: https://askcar.co.uk/car/porsche-718-cayman-2018-eb12d0edc77b