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: 54,341 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 149 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A6 Avant S Line is advertised with 54,341 miles, approximately 2,700 above the typical mileage for its age. Priced at £21,990, it is advertised £937 below the AskCar estimate of £22,927. The AskCar estimate draws on 785 Audi A6 Avant adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We have tracked this advert for 103 days. Our records show an MOT expiry date of 26 August 2026, which has passed. Ask the dealer for an update. We checked its advertised mileage against the government's MOT record, and they match. It is for sale at Brownroyd Motors in Heywood. 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: £937 (4%) under the AskCar estimate of £22,927.

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 103 days.

Price history

AskCar first saw this advert on 25 July 2026 at £21,990. 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: the latest record we hold ran out on 26 August 2026; ask the dealer for the current MOT.

It has had 2 MOTs. The latest, on 22 August 2025, passed.

Advisories at the latest test: both rear tyres perishing on the inner edges.

Mileage at that test: 43,487 miles, which matches the advertised 54,341 miles.

Advertised mileage is about 2,700 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, black. Mileage: 55,920 miles. Price: £21,695, £295 less 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, black. Mileage: 51,313 miles. Price: £22,990, £1,000 more than this car. Dealer: Malt Mill Motors in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-68090e29dd0b
• 2021 Audi A6 Avant S Line, 2.0 diesel estate, white. Mileage: 49,315 miles. Price: £21,999, the same price as 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, 29 miles from this car. Mileage: 65,348 miles. Price: £19,640, £2,350 less than this car. Dealer: Riverside Volvo Wakefield in Wakefield. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-936bbc4d7e07