2021 Porsche 718 Cayman 4.0 GT4

Overview

• Make: Porsche
• Model: 718 Cayman
• Trim: GT4
• Version: 4.0 GT4 PDK RWD Euro 6 2dr (414 bhp)
• Year: 2021
• Mileage: 39,136 miles
• Fuel: Petrol
• Body: Coupe, 2 doors, 2 seats
• Engine: 4.0 litres, 414 bhp
• Gearbox: Automatic (PDK)
• Drive: Rear-wheel drive
• Colour: Blue
• CO2: 242 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Porsche 718 Cayman Gt4 is advertised with 39,136 miles, approximately 18,100 above the typical mileage for its age. Its asking price of £74,990 is £4,864 above the AskCar estimate of £70,126. The AskCar estimate uses UK dealer asking prices, including 306 Porsche 718 Cayman adverts, and accounts for the car’s age, mileage and specification. Since we first spotted the advert 12 days ago, the asking price has dropped by £1,000. Its advertised mileage matches the government's MOT record. The seller is Group 1 Automotive Porsche Centre Portsmouth, based in Portsmouth. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £4,864 (6%) over the AskCar estimate of £70,126.

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 306 priced Porsche 718 Cayman adverts across different ages and specifications, as of 4 November 2026.

A 2021 Porsche 718 Cayman with the 4.0 petrol engine is typically advertised at £72,500: the median of the 16 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 Porsche 718 Cayman has been on sale for at least 12 days.

Price history

AskCar first saw this advert on 23 October 2026 at £75,990. Its asking price is now £74,990, £1,000 less. The latest price cut was seen on 1 November 2026.

Price changes recorded:

• 23 October 2026: £75,990
• 1 November 2026: £74,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 22 April 2027.

It has had 4 MOTs. The latest, on 15 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 35,446 miles, which matches the advertised 39,136 miles.

Advertised mileage is about 18,100 miles higher than the median mileage of a 2021 Porsche 718 Cayman on AskCar.

Similar cars

5 other 2021 Porsche 718 Cayman GT4 4.0 petrol automatic coupes are for sale at UK dealers, from £66,499 to £82,786, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Porsche 718 Cayman GT4, 4.0 petrol coupe, black. Mileage: 32,000 miles. Price: £74,995, the same price as this car. Dealer: Lakeside Motor Co in Hornsea. AskCar page: https://askcar.co.uk/car/porsche-718-cayman-2021-ec5b5bde45f1
• 2021 Porsche 718 Cayman GT4, 4.0 petrol coupe, green. Mileage: 17,328 miles. Price: £75,980, £990 more than this car. Dealer: The Driver's Paddock in Mansfield. AskCar page: https://askcar.co.uk/car/porsche-718-cayman-2021-787904394a45
• 2021 Porsche 718 Cayman GT4, 4.0 petrol coupe, white. Mileage: 13,447 miles. Price: £81,750, £6,760 more than this car. Dealer: Sytner Group Porsche Centre Leicester in Leicester. AskCar page: https://askcar.co.uk/car/porsche-718-cayman-2021-8c9caa812df6