2018 Porsche 911 3.0 991 4S
Price: £78,980. Fair price: £2,820 (3%) under the AskCar estimate of £81,800, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,947 priced Porsche 911 adverts on AskCar as of 4 November 2026.
AskCar lists 2,434 used Porsche 911 from 619 UK dealerships, as of 4 November 2026.
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: 35,000 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
At 35,000 miles, this 2018 Porsche 911 991 4S has covered about 14,300 more miles than other 2018 Porsche 911 cars. The dealer is asking £78,980, which is £2,820 below the AskCar estimate of £81,800. To work out the AskCar estimate, we analyse UK dealer adverts for 1,947 Porsche 911 cars across different ages and specifications. We first recorded this advert 92 days ago, and its asking price has since fallen by £6,000. You can find this car at Auto100.Co.Uk in Sutton-in-Ashfield. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £2,820 (3%) under the AskCar estimate of £81,800.
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 1,947 priced Porsche 911 adverts across different ages and specifications, as of 4 November 2026.
A 2018 Porsche 911 with the 3.0 petrol engine is typically advertised at £79,000: the median of the 42 for sale on AskCar, as of 4 November 2026.
Time on sale
This 2018 Porsche 911 has been on sale for at least 92 days.
Price history
AskCar first saw this advert on 4 August 2026 at £84,980. Its asking price is now £78,980, £6,000 less. The latest price cut was seen on 27 October 2026.
Price changes recorded:
- 4 August 2026: £84,980
- 26 August 2026: £82,980
- 1 September 2026: £83,980
- 16 September 2026: £82,980
- 23 September 2026: £82,480
- 30 September 2026: £81,980
- 2 October 2026: £80,980
- 7 October 2026: £79,980
- 15 October 2026: £78,980
- 21 October 2026: £78,780
- 27 October 2026: £77,980
- 3 November 2026: £78,980
Mileage and MOT
Advertised mileage is about 14,300 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 4 November 2026.
The 3 closest to this car in mileage:
- 2018 Porsche 911 991 4S, 3.0 petrol convertible, black. Mileage: 29,993 miles. Price: £77,990, £990 less than this car. Dealer: G C Motors in Harrogate. AskCar page: https://askcar.co.uk/car/porsche-911-2018-eac057d8e66f
- 2018 Porsche 911 991 4S, 3.0 petrol convertible, grey. Mileage: 20,559 miles. Price: £86,850, £7,870 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, £8,980 less than this car. Dealer: Brooklyns in Broxbourne. AskCar page: https://askcar.co.uk/car/porsche-911-2018-8b8881a7bca9
Browse all Porsche 911 cars for sale · 2018 Porsche 911 price guide
More like this
- Used automatic Porsche 911 for sale
- Used petrol Porsche 911 for sale
- Used Porsche 911 for sale near Mansfield
Photos
44 photos of this car are on its AskCar page.
As of 4 November 2026, AskCar lists 592,552 cars and vans from 12,964 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.