2020 Audi A6 Saloon 2.0 TDI S Line

Overview

• Make: Audi
• Model: A6 Saloon
• Trim: S Line
• Version: 2.0 TDI 40 S Line S tronic FWD Euro 6 (s/s) 4dr (201 bhp)
• Year: 2020
• Mileage: 28,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Grey
• CO2: 118 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 28,000 miles, this 2020 Audi A6 Saloon S Line has covered about 29,900 fewer miles than other 2020 Audi A6 Saloon cars. The dealer is asking £21,999, which is £209 above the AskCar estimate of £21,790. To work out the AskCar estimate, we analyse UK dealer adverts for 871 Audi A6 Saloon cars across different ages and specifications. This car was first seen in our listings data 161 days ago. Our latest MOT record expired on 6 August 2026. Check the current position with the dealer. We checked its advertised mileage against the government's MOT record, and they match. It is advertised by AB Car Sales in Gunnislake. 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: £209 (under 1%) over the AskCar estimate of £21,790.

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 871 priced Audi A6 Saloon adverts across different ages and specifications, as of 5 November 2026.

A 2020 Audi A6 Saloon with the 2.0 diesel engine is typically advertised at £18,000: the median of the 58 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2020 Audi A6 Saloon has been on sale for at least 161 days.

Price history

AskCar first saw this advert on 28 May 2026 at £21,999. 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 6 August 2026; ask the dealer for the current MOT.

It has had 4 MOTs. The latest, on 30 July 2025, passed.

There were no advisories at the latest test.

Mileage at that test: 27,093 miles, which matches the advertised 28,000 miles.

Advertised mileage is about 29,900 miles lower than the median mileage of a 2020 Audi A6 Saloon on AskCar.

Similar cars

19 other 2020 Audi A6 Saloon S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £13,595 to £20,450, as of 5 November 2026.

The 3 closest to this car in mileage:

• 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, white. Mileage: 34,000 miles. Price: £19,950, £2,049 less than this car. Dealer: Westleigh Prestige in Wickford. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-94b6449627b2
• 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 34,000 miles. Price: £20,450, £1,549 less than this car. Dealer: Farlan Automotive in Wembley. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-43ab3193a800
• 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 38,780 miles. Price: £18,900, £3,099 less than this car. Dealer: Motor Match Stockport in Stockport. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-959980fd3a45

• The nearest: 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, white, 130 miles from this car. Mileage: 79,000 miles. Price: £17,590, £4,409 less than this car. Dealer: MB Cars Swindon in Swindon. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-bf9abd585ce8