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 4WD Euro 6 5dr (201 bhp)
• Year: 2021
• Mileage: 86,000 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Four-wheel drive
• Colour: Red
• CO2: 152 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A6 Avant S Line is advertised with 86,000 miles, approximately 34,800 above the typical mileage for its age. Its asking price of £19,995 is £958 above the AskCar estimate of £19,037. The AskCar estimate uses UK dealer asking prices, including 783 Audi A6 Avant adverts, and accounts for the car’s age, mileage and specification. It first appeared in our advert records 1 day ago. Its advertised mileage matches the government's MOT record. It is advertised by MC Autosales in Magherafelt. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 6 November 2026.

How we estimate prices and check cars

Price

Fair price: £958 (5%) over the AskCar estimate of £19,037.

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 783 priced Audi A6 Avant adverts across different ages and specifications, as of 6 November 2026.

A 2021 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £23,000: the median of the 37 for sale on AskCar, as of 6 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: 36 of the 63 first advertised between 13 July 2026 and 3 October 2026.

Price history

AskCar first saw this advert on 5 November 2026 at £19,995. 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 6 November 2026: valid until 17 June 2027.

It has had 3 MOTs. The latest, on 11 June 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 85,528 miles, which matches the advertised 86,000 miles.

Advertised mileage is about 34,800 miles higher than the median mileage of a 2021 Audi A6 Avant on AskCar.

Similar cars

9 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 6 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 89,000 miles. Price: £18,491, £1,504 less than this car. Dealer: Sapphire Motors in London. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-90bc35dd3e02
• 2021 Audi A6 Avant S Line, 2.0 diesel estate, white. Mileage: 69,000 miles. Price: £22,395, £2,400 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, white. Mileage: 65,348 miles. Price: £19,640, £355 less than this car. Dealer: Riverside Volvo Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-936bbc4d7e07