2020 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: 2020
• Mileage: 71,629 miles
• Fuel: Diesel
• Body: Estate, 5 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Four-wheel drive
• Colour: Grey
• CO2: 161 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2020 Audi A6 Avant S Line is advertised with 71,629 miles on the clock. Its asking price of £18,995 is £359 above the AskCar estimate of £18,636. The AskCar estimate uses UK dealer asking prices, including 774 Audi A6 Avant adverts, and accounts for the car’s age, mileage and specification. We first recorded this car for sale 64 days ago. Its advertised mileage matches the government's MOT record. It is for sale at Wallace Car Sales in Bolton. 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: £359 (1%) over the AskCar estimate of £18,636.

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 64 days.

Price history

AskCar first saw this advert on 1 September 2026 at £18,995. 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 4 November 2026: valid until 14 April 2027.

It has had 5 MOTs. The latest, on 2 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 66,770 miles, which matches the advertised 71,629 miles.

Advertised mileage is about 1,600 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: 72,692 miles. Price: £16,995, £2,000 less than this car. Dealer: Banks Of The Tyne Motor Company in Hebburn. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-9187a355dc32
• 2020 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 73,000 miles. Price: £17,499, £1,496 less than this car. Dealer: Hendy Car Store Portsmouth in Portsmouth. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-6ac82ef797dd
• 2020 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 74,000 miles. Price: £18,750, £245 less than this car. Dealer: The Car Company in Belfast. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-e456e1599691

• The nearest: 2020 Audi A6 Avant S Line, 2.0 diesel estate, black, 2 miles from this car. Mileage: 59,856 miles. Price: £19,500, £505 more than this car. Dealer: Invicta Omoda Jaecoo Mazda Bolton in Bolton. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-ddb515e5b8c6