2020 Audi A6 Avant 2.0 TDI S Line

Overview

• Make: Audi
• Model: A6 Avant
• Trim: S Line
• Version: 2.0 TDI 40 S Line S tronic FWD Euro 6 (s/s) 5dr (201 bhp)
• Year: 2020
• Mileage: 54,000 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: 124 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 Audi A6 Avant S Line is advertised with 54,000 miles, approximately 19,200 below the typical mileage for its age. The AskCar estimate for this car is £21,237. It is priced at £19,900, which is £1,337 below that estimate. The AskCar estimate uses 774 UK dealer adverts for the Audi A6 Avant, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 34 days ago. Its asking price has since fallen by £1,000. The government's MOT record matches its advertised mileage. It is for sale at Automoto UK in Banbridge. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £1,337 (6%) under the AskCar estimate of £21,237.

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 774 priced Audi A6 Avant adverts across different ages and specifications, as of 4 November 2026.

A 2020 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £18,500: the median of the 33 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2020 Audi A6 Avant has been on sale for at least 34 days.

Price history

AskCar first saw this advert on 1 October 2026 at £20,900. Its asking price is now £19,900, £1,000 less. The latest price cut was seen on 31 October 2026.

Price changes recorded:

• 1 October 2026: £20,900
• 9 October 2026: £20,400
• 31 October 2026: £19,900

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 12 February 2027.

It has had 3 MOTs. The latest, on 13 February 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 48,269 miles, which matches the advertised 54,000 miles.

Advertised mileage is about 19,200 miles lower than the median mileage of a 2020 Audi A6 Avant on AskCar.

Similar cars

15 other 2020 Audi A6 Avant S Line 2.0 diesel automatic estates are for sale at UK dealers, from £15,290 to £23,000, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2020 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 54,469 miles. Price: £23,000, £3,100 more than this car. Dealer: Sytner Group Audi Reading in Reading. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-1866fd06d900
• 2020 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 59,422 miles. Price: £19,985, £85 more than this car. Dealer: Listers Birmingham Audi in Birmingham. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-c81a88f062aa
• 2020 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 59,856 miles. Price: £19,500, £400 less than this car. Dealer: Invicta Omoda Jaecoo Mazda Bolton in Bolton. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-ddb515e5b8c6

• The nearest: 2020 Audi A6 Avant S Line, 2.0 diesel estate, grey, 23 miles from this car. Mileage: 74,000 miles. Price: £18,750, £1,150 less than this car. Dealer: The Car Company in Belfast. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-e456e1599691