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: 37,803 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
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 37,803 miles on the clock, this 2021 Audi A6 Avant S Line has done roughly 12,400 fewer miles than a typical 2021 Audi A6 Avant. The AskCar estimate for this car is £24,557. It is priced at £22,687, which is £1,870 below that estimate. The AskCar estimate uses 779 UK dealer adverts for the Audi A6 Avant, with adjustments for age, mileage, trim, engine and other specifications. This car was first seen in our listings data 1 day ago. The seller is Vertu Motors Seat Cupra Darlington, based in Darlington. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 10 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,870 (7%) under the AskCar estimate of £24,557.

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 10 November 2026.

A 2021 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £22,700: the median of the 35 for sale on AskCar, as of 10 November 2026.

Time on sale

AskCar first saw this 2021 Audi A6 Avant advertised 1 day ago. About 6 in 10 of 2021 Audi A6 Avant cars are gone from sale within a month of being advertised: 37 of the 64 first advertised between 13 July 2026 and 7 October 2026.

Price history

AskCar first saw this advert on 9 November 2026 at £22,687. Its asking price has not changed.

Mileage and MOT

Advertised mileage is about 12,400 miles lower than the median mileage of a 2021 Audi A6 Avant on AskCar.

Similar cars

10 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 10 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 33,114 miles. Price: £24,995, £2,308 more than this car. Dealer: Group 1 Automotive Chelmsford Audi in Chelmsford. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-775ebcd21347
• 2021 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 32,800 miles. Price: £25,995, £3,308 more than this car. Dealer: Hynes Motors in Newry. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-8f7c904e4aa2
• 2021 Audi A6 Avant S Line, 2.0 diesel estate, white. Mileage: 49,315 miles. Price: £22,999, £312 more than this car. Dealer: Fresh Motors in Watton. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-06b2368d3dba

• The nearest: 2021 Audi A6 Avant S Line, 2.0 diesel estate, white, 60 miles from this car. Mileage: 65,348 miles. Price: £18,499, £4,188 less than this car. Dealer: Riverside Volvo Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-936bbc4d7e07