2021 Audi A6 Avant 2.0 TDI S Line

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: 61,000 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 149 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A6 Avant S Line is advertised with 61,000 miles, approximately 10,400 above the typical mileage for its age. Priced at £19,989, it is advertised £1,399 below the AskCar estimate of £21,388. The AskCar estimate draws on 779 Audi A6 Avant adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this car for sale today. Its advertised mileage matches the government's MOT record. You can find this car at Bluehawk Automotive in Hounslow. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 12 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,399 (6%) under the AskCar estimate of £21,388.

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 779 priced Audi A6 Avant adverts across different ages and specifications, as of 12 November 2026.

A 2021 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £22,700: the median of the 37 for sale on AskCar, as of 12 November 2026.

Time on sale

AskCar first saw this 2021 Audi A6 Avant advertised today. About 6 in 10 of 2021 Audi A6 Avant cars are gone from sale within a month of being advertised: 38 of the 66 first advertised between 13 July 2026 and 9 October 2026.

Price history

AskCar first saw this advert on 12 November 2026 at £19,989. 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 12 November 2026: valid until 3 February 2027.

It failed its MOT on 12 January 2026 (nearside front tyre has a cut in excess of the requirements deep enough to reach the ply or cords; nearside front outer drive shaft joint constant velocity boot severely deteriorated) and passed 1 day later, on 13 January 2026.

Advisories at the latest test: nearside front outer drive shaft joint constant velocity boot severely deteriorated.

Mileage at that test: 47,517 miles, which matches the advertised 61,000 miles.

Advertised mileage is about 10,400 miles higher than the median mileage of a 2021 Audi A6 Avant on AskCar.

Similar cars

11 other 2021 Audi A6 Avant S Line 2.0 diesel automatic estates are for sale at UK dealers, from £18,200 to £25,995, as of 12 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A6 Avant S Line, 2.0 diesel estate, white. Mileage: 65,348 miles. Price: £18,499, £1,490 less than this car. Dealer: Riverside Volvo Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-936bbc4d7e07
• 2021 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 55,920 miles. Price: £21,450, £1,461 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, white. Mileage: 69,000 miles. Price: £22,395, £2,406 more than this car. Dealer: MC Autosales in Magherafelt. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-20a37b0c61d7

• The nearest: 2021 Audi A6 Avant S Line, 2.0 diesel estate, grey, 11 miles from this car. Mileage: 89,000 miles. Price: £18,491, £1,498 less than this car. Dealer: Sapphire Motors in London. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-90bc35dd3e02