2021 Audi A8 3.0 S Line
Price: £19,495. Above the going rate: £1,716 (9%) over the AskCar estimate of £17,779, our expected asking price for this car from its model, age, mileage and specification, drawing on 214 priced Audi A8 adverts on AskCar as of 2 November 2026.
AskCar lists 225 used Audi A8 from 191 UK dealerships, as of 2 November 2026.
Overview
- Make: Audi
- Model: A8
- Trim: S Line
- Version: 3.0 TDI S Line Tiptronic 4WD Euro 6 4dr (281 bhp)
- Year: 2021
- Mileage: 122,000 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 3.0 litres, 281 bhp
- Gearbox: Automatic (Tiptronic)
- Drive: Four-wheel drive
- Colour: Black
- CO2: 187 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Audi A8 S Line has covered 122,000 miles, around 65,200 more miles than is typical for its age. The AskCar estimate for this car is £17,779. It is priced at £19,495, which is £1,716 above that estimate. The AskCar estimate draws on 214 Audi A8 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert for 34 days. According to the government's MOT record, its advertised mileage is consistent with the latest test. It is for sale at Motor Trade Centre in Ilford. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 2 November 2026.
Price
Above the going rate: £1,716 (9%) over the AskCar estimate of £17,779.
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 214 priced Audi A8 adverts across different ages and specifications, as of 2 November 2026.
A 2021 Audi A8 with the 3.0 diesel engine is typically advertised at £26,700: the median of the 11 for sale on AskCar, as of 2 November 2026.
Time on sale
This 2021 Audi A8 has been on sale for at least 34 days.
Price history
AskCar first saw this advert on 29 September 2026 at £19,495. 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 2 November 2026: valid until 7 November 2026.
It failed its MOT on 27 October 2025 (nearside rear road wheel fixing missing 1 x bolt missing) and passed later the same day.
There were no advisories at the latest test.
Mileage at that test: 117,699 miles, which matches the advertised 122,000 miles.
Advertised mileage is about 65,200 miles higher than the median mileage of a 2021 Audi A8 on AskCar.
Similar cars
3 other 2021 Audi A8 S Line 3.0 diesel automatic saloons are for sale at UK dealers, from £24,995 to £29,393, as of 2 November 2026.
The 3 closest to this car in mileage:
- 2021 Audi A8 S Line, 3.0 diesel saloon, black. Mileage: 60,000 miles. Price: £24,995, £5,500 more than this car. Dealer: Motoring World London Motoring World in Hillingdon. AskCar page: https://askcar.co.uk/car/audi-a8-2021-7212e1dc57b0
- 2021 Audi A8 S Line, 3.0 diesel saloon, black. Mileage: 50,400 miles. Price: £27,499, £8,004 more than this car. Dealer: Approved Cars & Finance Approved Cars in East Peckham. AskCar page: https://askcar.co.uk/car/audi-a8-2021-868b376f313e
- 2021 Audi A8 S Line, 3.0 diesel saloon, grey. Mileage: 24,000 miles. Price: £29,393, £9,898 more than this car. Dealer: Lookers Audi Teesside in Teesside. AskCar page: https://askcar.co.uk/car/audi-a8-2021-e73546b77166
Browse all Audi A8 cars for sale · 2021 Audi A8 price guide
More like this
- Used Audi A8 S Line prices
- Used Audi A8 for sale under £20,000
- Used diesel Audi A8 for sale
- Used Audi A8 for sale near Havering
Photos
34 photos of this car are on its AskCar page.
As of 2 November 2026, AskCar lists 586,270 cars and vans from 12,920 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.