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 Euro 6 5dr (201 bhp)
• Year: 2021
• Mileage: 51,313 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Colour: Black
• CO2: 152 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A6 Avant S Line is advertised with 51,313 miles on the clock. Priced at £22,990, it is advertised £136 below the AskCar estimate of £23,126. The AskCar estimate uses UK dealer asking prices, including 785 Audi A6 Avant adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert for 7 days. Its advertised mileage matches the government's MOT record. You can find this car at Malt Mill Motors in Nottingham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 5 November 2026.

How we estimate prices and check cars

Price

Fair price: £136 (under 1%) under the AskCar estimate of £23,126.

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 7 days.

Price history

AskCar first saw this advert on 29 October 2026 at £22,990. 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 5 November 2026: valid until 26 March 2027.

It has had 3 MOTs. The latest, on 27 March 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 51,073 miles, which matches the advertised 51,313 miles.

Advertised mileage is about 300 miles lower 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: 49,315 miles. Price: £21,999, £991 less than this car. Dealer: Fresh Motors in Watton. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-06b2368d3dba
• 2021 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 54,341 miles. Price: £21,990, £1,000 less than this car. Dealer: Brownroyd Motors in Heywood. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-bc975a828b44
• 2021 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 55,920 miles. Price: £21,695, £1,295 less than this car. Dealer: Stratstone Hitchin Audi in Hitchin. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-24c1afb209f4

• The nearest: 2021 Audi A6 Avant S Line, 2.0 diesel estate, white, 51 miles from this car. Mileage: 65,348 miles. Price: £19,640, £3,350 less than this car. Dealer: Riverside Volvo Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-936bbc4d7e07