2021 Audi A6 Avant 2.0 TDI S Line
Price: £19,640. Good value: £1,713 (8%) under the AskCar estimate of £21,353, our expected asking price for this car from its model, age, mileage and specification, drawing on 785 priced Audi A6 Avant adverts on AskCar as of 5 November 2026.
AskCar lists 810 used Audi A6 Avant from 596 UK dealerships, as of 5 November 2026.
Overview
- Make: Audi
- Model: A6 Avant
- Trim: S Line
- Version: 2.0 TDI S Line S tronic FWD Euro 6 5dr (201 bhp)
- Year: 2021
- Mileage: 65,348 miles
- Fuel: Diesel
- Body: Estate, 5 doors, 5 seats
- Engine: 2.0 litres, 201 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: White
- CO2: 149 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
This 2021 Audi A6 Avant S Line is advertised with 65,348 miles, approximately 13,700 above the typical mileage for its age. The AskCar estimate for this car is £21,353. It is priced at £19,640, which is £1,713 below that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 785 Audi A6 Avant cars across different ages and specifications. This car was first seen in our listings data 14 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Riverside Volvo Wakefield, based in Wakefield. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 5 November 2026.
Price
Good value: £1,713 (8%) under the AskCar estimate of £21,353.
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 785 priced Audi A6 Avant adverts across different ages and specifications, as of 5 November 2026.
A 2021 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £22,400: the median of the 37 for sale on AskCar, as of 5 November 2026.
Time on sale
This 2021 Audi A6 Avant has been on sale for at least 14 days.
Price history
AskCar first saw this advert on 22 October 2026 at £19,490. Its asking price is now £19,640, £150 more.
Price changes recorded:
- 22 October 2026: £19,490
- 31 October 2026: £19,640
Mileage and MOT
MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 20 January 2027.
It has had 3 MOTs. The latest, on 30 December 2025, passed.
There were no advisories at the latest test.
Mileage at that test: 57,847 miles, which matches the advertised 65,348 miles.
Advertised mileage is about 13,700 miles higher than the median mileage of a 2021 Audi A6 Avant on AskCar.
Similar cars
8 other 2021 Audi A6 Avant S Line 2.0 diesel automatic estates are for sale at UK dealers, from £18,491 to £25,995, as of 5 November 2026.
The 3 closest to this car in mileage:
- 2021 Audi A6 Avant S Line, 2.0 diesel estate, white. Mileage: 69,000 miles. Price: £22,395, £2,755 more than this car. Dealer: MC Autosales in Magherafelt. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-20a37b0c61d7
- 2021 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 55,920 miles. Price: £21,695, £2,055 more than this car. Dealer: Stratstone Hitchin Audi in Hitchin. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-24c1afb209f4
- 2021 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 54,341 miles. Price: £21,990, £2,350 more than this car. Dealer: Brownroyd Motors in Heywood. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-bc975a828b44
Browse all Audi A6 Avant cars for sale · 2021 Audi A6 Avant price guide
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As of 5 November 2026, AskCar lists 595,776 cars and vans from 12,945 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.