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 FWD Euro 6 5dr (201 bhp)
• Year: 2020
• Mileage: 54,469 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: 160 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 54,469 miles on the clock, this 2020 Audi A6 Avant S Line has done roughly 18,500 fewer miles than a typical 2020 Audi A6 Avant. The dealer is asking £23,000, which is £1,986 above the AskCar estimate of £21,014. To work out the AskCar estimate, we analyse UK dealer adverts for 785 Audi A6 Avant cars across different ages and specifications. This car was first seen in our listings data 19 days ago. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Group Audi Reading, based in Reading. 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

Above the going rate: £1,986 (9%) over the AskCar estimate of £21,014.

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 2020 Audi A6 Avant with the 2.0 diesel engine is typically advertised at £18,500: the median of the 32 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2020 Audi A6 Avant has been on sale for at least 19 days.

Price history

AskCar first saw this advert on 17 October 2026 at £23,000. 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: valid until 16 October 2027.

It has had 5 MOTs. The latest, on 13 October 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 54,408 miles, which matches the advertised 54,469 miles.

Advertised mileage is about 18,500 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 £14,990 to £22,207, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2020 Audi A6 Avant S Line, 2.0 diesel estate, grey. Mileage: 54,000 miles. Price: £19,900, £3,100 less than this car. Dealer: Automoto UK in Banbridge. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-17697c90fe36
• 2020 Audi A6 Avant S Line, 2.0 diesel estate, black. Mileage: 59,422 miles. Price: £19,985, £3,015 less 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, £3,500 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, white, 7 miles from this car. Mileage: 108,966 miles. Price: £14,990, £8,010 less than this car. Dealer: Anchor Cars in Reading. AskCar page: https://askcar.co.uk/car/audi-a6-avant-2020-3f2a00f63d4d