2018 Audi A8 3.0 S Line

Overview

• Make: Audi
• Model: A8
• Trim: S Line
• Version: 3.0 50 TDI S Line Tiptronic 4WD Euro 6 4dr (282 bhp)
• Year: 2018
• Mileage: 10,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 3.0 litres, 282 bhp
• Gearbox: Automatic (Tiptronic)
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 156 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2018 Audi A8 S Line is advertised with 10,000 miles on the clock. The AskCar estimate for this car is £29,011, but it is priced at £16,950, a difference of £12,061. Ask the dealer to confirm the price and vehicle details. The AskCar estimate uses UK dealer asking prices, including 219 Audi A8 adverts, and accounts for the car’s age, mileage and specification. We first recorded this advert 160 days ago, and its asking price has since fallen by £2,400. The last MOT shows 85,096 miles, more than the advert. This is worth checking with the dealer. Our records show an MOT expiry date of 24 June 2026, which has passed. Ask the dealer for an update. The seller is Car Firm Peterborough, based in Peterborough. 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

Far below the going rate: £12,061 (41%) under the AskCar estimate of £29,011. Worth asking the dealer why.

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 219 priced Audi A8 adverts across different ages and specifications, as of 4 November 2026.

A 2018 Audi A8 with the 3.0 diesel engine is typically advertised at £21,200: the median of the 24 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2018 Audi A8 has been on sale for at least 160 days.

Price history

AskCar first saw this advert on 28 May 2026 at £19,350. Its asking price is now £16,950, £2,400 less. The latest price cut was seen on 6 October 2026.

Price changes recorded:

• 28 May 2026: £19,350
• 10 July 2026: £18,350
• 28 September 2026: £17,500
• 6 October 2026: £16,950

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 24 June 2026; ask the dealer for the current MOT.

It failed its MOT on 25 June 2025 (nearside front tyre tread depth below requirements of 1.6mm tyre below legal requirements for tread; engine MIL inoperative or indicates a malfunction engine management light indicates fault) and passed later the same day.

Advisories at the latest test: rear brake pad(s) wearing thin rear brake pads getting low both sides.

Mileage at that test: 85,096 miles. The advert says 10,000 miles, fewer than the MOT record, so ask the dealer which is right.

Advertised mileage is about 45,800 miles lower than the median mileage of a 2018 Audi A8 on AskCar.

Similar cars

3 other 2018 Audi A8 S Line 3.0 diesel automatic saloons are for sale at UK dealers, from £17,295 to £24,498, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2018 Audi A8 S Line, 3.0 diesel saloon, grey. Mileage: 52,911 miles. Price: £24,498, £7,548 more than this car. Dealer: Arnold Clark Liverpool Motorstore / MG / Chery in Liverpool. AskCar page: https://askcar.co.uk/car/audi-a8-2018-a02ed9e7d3d8
• 2018 Audi A8 S Line, 3.0 diesel saloon, blue. Mileage: 89,510 miles. Price: £18,998, £2,048 more than this car. Dealer: Arnold Clark Huddersfield Motorstore in Huddersfield. AskCar page: https://askcar.co.uk/car/audi-a8-2018-44616b195180
• 2018 Audi A8 S Line, 3.0 diesel saloon, blue. Mileage: 98,336 miles. Price: £17,295, £345 more than this car. Dealer: Pavilion Motor Company in Oldham. AskCar page: https://askcar.co.uk/car/audi-a8-2018-e1678764fdb6