2021 Audi A6 Saloon 2.0 TDI S Line

Overview

• Make: Audi
• Model: A6 Saloon
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr 40 (201 bhp)
• Year: 2021
• Mileage: 82,000 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A6 Saloon S Line has covered 82,000 miles, around 25,400 more miles than is typical for its age. The dealer is asking £18,000, which is £634 above the AskCar estimate of £17,366. To work out the AskCar estimate, we analyse UK dealer adverts for 874 Audi A6 Saloon cars across different ages and specifications. Since we first spotted the advert 160 days ago, the asking price has dropped by £1,000. Our records show an MOT expiry date of 22 October 2026, which has passed. Ask the dealer for an update. The government's MOT record matches its advertised mileage. It is for sale at Alistair Buchan in East Wemyss. 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: £634 (3%) over the AskCar estimate of £17,366.

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

A 2021 Audi A6 Saloon with the 2.0 diesel engine is typically advertised at £18,300: the median of the 80 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 Audi A6 Saloon has been on sale for at least 160 days.

Price history

AskCar first saw this advert on 28 May 2026 at £19,000. Its asking price is now £18,000, £1,000 less. The latest price cut was seen on 24 October 2026.

Price changes recorded:

• 28 May 2026: £19,000
• 18 July 2026: £18,750
• 25 July 2026: £18,500
• 5 August 2026: £18,250
• 24 October 2026: £18,000

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: the latest record we hold ran out on 22 October 2026; ask the dealer for the current MOT.

It has had 3 MOTs. The latest, on 21 October 2025, passed.

Advisories at the latest test: front tyre worn close to legal limit/worn on edge 2x 245/45/19.

Mileage at that test: 64,162 miles, which matches the advertised 82,000 miles.

Advertised mileage is about 25,400 miles higher than the median mileage of a 2021 Audi A6 Saloon on AskCar.

Similar cars

13 other 2021 Audi A6 Saloon S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £15,770 to £21,000, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 79,921 miles. Price: £16,400, £1,600 less than this car. Dealer: Carworld Car Supermarket in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-fa93dd72f012
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, blue. Mileage: 75,378 miles. Price: £17,699, £301 less than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-b239d25d51d8
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 75,342 miles. Price: £19,490, £1,490 more than this car. Dealer: Fermanagh Auto Sales in Enniskillen. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-93b403df75b2

• The nearest: 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black, 49 miles from this car. Mileage: 69,561 miles. Price: £18,498, £498 more than this car. Dealer: Arnold Clark Glasgow Bishopbriggs MG in Bishopbriggs. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-2be7c0bb819c