2018 Porsche 911 3.0 991 4S

Overview

• Make: Porsche
• Model: 911
• Trim: 991 4S
• Version: 3.0 T 991 4S PDK 4WD Euro 6 (s/s) 2dr Targa (414 bhp)
• Year: 2018
• Mileage: 29,993 miles
• Fuel: Petrol
• Body: Convertible, 2 doors, 4 seats
• Engine: 3.0 litres, 414 bhp
• Gearbox: Automatic (PDK)
• Drive: Four-wheel drive
• Colour: Black
• CO2: 184 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Porsche 911 991 4S has covered 29,993 miles, around 9,100 more miles than is typical for its age. The AskCar estimate for this car is £84,273. It is priced at £77,990, which is £6,283 below that estimate. The AskCar estimate draws on 1,926 Porsche 911 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this advert 54 days ago, and its asking price has since fallen by £3,000. Its advertised mileage matches the government's MOT record. You can find this car at G C Motors in Harrogate. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £6,283 (7%) under the AskCar estimate of £84,273.

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 1,926 priced Porsche 911 adverts across different ages and specifications, as of 2 November 2026.

A 2018 Porsche 911 with the 3.0 petrol engine is typically advertised at £79,500: the median of the 41 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2018 Porsche 911 has been on sale for at least 54 days.

Price history

AskCar first saw this advert on 9 September 2026 at £80,990. Its asking price is now £77,990, £3,000 less. The latest price cut was seen on 23 October 2026.

Price changes recorded:

• 9 September 2026: £80,990
• 30 September 2026: £79,990
• 23 October 2026: £77,990

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 23 December 2026.

It has had 6 MOTs. The latest, on 9 December 2025, passed.

Advisories at the latest test: nearside rear tyre worn close to legal limit/worn on edge; offside rear tyre worn close to legal limit/worn on edge not so close as n/s/r.

Mileage at that test: 27,051 miles, which matches the advertised 29,993 miles.

Advertised mileage is about 9,100 miles higher than the median mileage of a 2018 Porsche 911 on AskCar.

Similar cars

3 other 2018 Porsche 911 991 4S 3.0 petrol automatic convertibles are for sale at UK dealers, from £70,000 to £86,850, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2018 Porsche 911 991 4S, 3.0 petrol convertible, black. Mileage: 35,000 miles. Price: £77,980, the same price as this car. Dealer: Auto100.Co.Uk in Sutton in Ashfield. AskCar page: https://askcar.co.uk/car/porsche-911-2018-d3fee0951810
• 2018 Porsche 911 991 4S, 3.0 petrol convertible, grey. Mileage: 20,559 miles. Price: £86,850, £8,860 more than this car. Dealer: Dick Lovett Porsche Centre Swindon in Swindon. AskCar page: https://askcar.co.uk/car/porsche-911-2018-46441acf3793
• 2018 Porsche 911 991 4S, 3.0 petrol convertible, silver. Mileage: 59,000 miles. Price: £70,000, £7,990 less than this car. Dealer: Brooklyns in Broxbourne. AskCar page: https://askcar.co.uk/car/porsche-911-2018-8b8881a7bca9