2018 Porsche 911 4.0 991 GT3
Price: £134,949. Fair price: £2,710 (1%) under the AskCar estimate of £137,659, 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 GT3
- Version: 4.0 991 GT3 PDK RWD Euro 6 2dr (492 bhp)
- Year: 2018
- Mileage: 20,000 miles
- Fuel: Petrol
- Body: Coupe, 2 doors, 2 seats
- Engine: 4.0 litres, 492 bhp
- Gearbox: Automatic (PDK)
- Drive: Rear-wheel drive
- Colour: Blue
- CO2: 288 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
The advertised mileage for this 2018 Porsche 911 991 Gt3 is 20,000 miles. Its asking price of £134,949 is £2,710 below the AskCar estimate of £137,659. The AskCar estimate uses 1,947 UK dealer adverts for the Porsche 911, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 57 days ago. The government's MOT record matches its advertised mileage. You can find this car at DMB Collection Thirsk in North Yorkshire. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £2,710 (1%) under the AskCar estimate of £137,659.
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 4.0 petrol engine is typically advertised at £136,000: the median of the 14 for sale on AskCar, as of 4 November 2026.
Time on sale
This 2018 Porsche 911 has been on sale for at least 57 days.
Price history
AskCar first saw this advert on 8 September 2026 at £134,949. 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 4 November 2026: valid until 5 June 2027.
It has had 7 MOTs. The latest, on 6 June 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 19,315 miles, which matches the advertised 20,000 miles.
Advertised mileage is about 700 miles lower than the median mileage of a 2018 Porsche 911 on AskCar.
Similar cars
4 other 2018 Porsche 911 991 GT3 4.0 petrol automatic coupes are for sale at UK dealers, from £129,990 to £145,000, as of 4 November 2026.
The 3 closest to this car in mileage:
- 2018 Porsche 911 991 GT3, 4.0 petrol coupe, yellow. Mileage: 17,974 miles. Price: £145,000, £10,051 more than this car. Dealer: JCT600 Approved Leeds in Leeds. AskCar page: https://askcar.co.uk/car/porsche-911-2018-ccb6e0ae0506
- 2018 Porsche 911 991 GT3, 4.0 petrol coupe, red. Mileage: 16,000 miles. Price: £129,990, £4,959 less than this car. Dealer: Hills Prestige in Lymington. AskCar page: https://askcar.co.uk/car/porsche-911-2018-bb3ba153000a
- 2018 Porsche 911 991 GT3, 4.0 petrol coupe, grey. Mileage: 26,607 miles. Price: £134,990, the same price as this car. Dealer: Baytree Cars in Derby. AskCar page: https://askcar.co.uk/car/porsche-911-2018-7cd52e00708d
Browse all Porsche 911 cars for sale · 2018 Porsche 911 price guide
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Photos
41 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.