2018 Porsche 911 4.0 991 GT3
Price: £134,990. Fair price: £2,351 (1%) over the AskCar estimate of £132,639, 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: 26,607 miles
- Fuel: Petrol
- Body: Coupe, 2 doors, 2 seats
- Engine: 4.0 litres, 492 bhp
- Gearbox: Automatic (PDK)
- Drive: Rear-wheel drive
- Colour: Grey
- CO2: 288 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2018 Porsche 911 991 Gt3 is advertised with 26,607 miles, approximately 5,900 above the typical mileage for its age. Its asking price of £134,990 is £2,351 above the AskCar estimate of £132,639. 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 42 days ago. Our records show an MOT expiry date of 3 November 2026, which has passed. Ask the dealer for an update. The government's MOT record matches its advertised mileage. You can find this car at Baytree Cars in Derby. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £2,351 (1%) over the AskCar estimate of £132,639.
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 42 days.
Price history
AskCar first saw this advert on 23 September 2026 at £134,990. 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: the latest record we hold ran out on 3 November 2026; ask the dealer for the current MOT.
It has had 5 MOTs. The latest, on 4 November 2025, passed.
There were no advisories at the latest test.
Mileage at that test: 21,908 miles, which matches the advertised 26,607 miles.
Advertised mileage is about 5,900 miles higher 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, grey. Mileage: 27,146 miles. Price: £134,995, the same price as this car. Dealer: JCT600 Porsche Centre Newcastle in Tynemouth. AskCar page: https://askcar.co.uk/car/porsche-911-2018-a9d0d2d31c12
- 2018 Porsche 911 991 GT3, 4.0 petrol coupe, blue. Mileage: 20,000 miles. Price: £134,949, the same price as this car. Dealer: DMB Collection Thirsk in Thirsk. AskCar page: https://askcar.co.uk/car/porsche-911-2018-1198047cd941
- 2018 Porsche 911 991 GT3, 4.0 petrol coupe, yellow. Mileage: 17,974 miles. Price: £145,000, £10,010 more than this car. Dealer: JCT600 Approved Leeds in Leeds. AskCar page: https://askcar.co.uk/car/porsche-911-2018-ccb6e0ae0506
Browse all Porsche 911 cars for sale · 2018 Porsche 911 price guide
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Photos
38 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.