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: 33,114 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 33,114 miles, approximately 18,000 below the typical mileage for its age. The AskCar estimate for this car is £25,734. It is priced at £24,995, which is £739 below that estimate. The AskCar estimate uses 783 UK dealer adverts for the Audi A6 Avant, with adjustments for age, mileage, trim, engine and other specifications. We have tracked this advert today. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Group 1 Automotive Chelmsford Audi, based in Chelmsford. 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: £739 (2%) under the AskCar estimate of £25,734.

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 today. 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 6 November 2026 at £24,995. 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 1 February 2027.

It has had 4 MOTs. The latest, on 2 February 2026, passed.

Advisories at the latest test: front brake pad(s) wearing thin; rear brake pad(s) wearing thin.

Mileage at that test: 31,038 miles, which matches the advertised 33,114 miles.

Advertised mileage is about 18,000 miles lower 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: 32,800 miles. Price: £25,995, £1,000 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, £1,996 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, black. Mileage: 51,313 miles. Price: £22,990, £2,005 less than this car. Dealer: Malt Mill Motors in Nottingham. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-68090e29dd0b

• The nearest: 2021 Audi A6 Avant S Line, 2.0 diesel estate, grey, 34 miles from this car. Mileage: 89,000 miles. Price: £18,491, £6,504 less than this car. Dealer: Sapphire Motors in London. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2021-90bc35dd3e02