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: 57,493 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: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A6 Saloon S Line has covered 57,493 miles. The dealer is asking £19,500, which is £966 below the AskCar estimate of £20,466. To work out the AskCar estimate, we analyse UK dealer adverts for 858 Audi A6 Saloon cars across different ages and specifications. Since we first spotted the advert 10 days ago, the asking price has dropped by £70. The government's MOT record matches its advertised mileage. You can find this car at Big Motoring World Blue Bell Hill in Chatham. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 2 November 2026.

How we estimate prices and check cars

Price

Fair price: £966 (4%) under the AskCar estimate of £20,466.

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 858 priced Audi A6 Saloon adverts across different ages and specifications, as of 2 November 2026.

A 2021 Audi A6 Saloon with the 2.0 diesel engine is typically advertised at £18,500: the median of the 80 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2021 Audi A6 Saloon has been on sale for at least 10 days.

Price history

AskCar first saw this advert on 23 October 2026 at £19,570. Its asking price is now £19,500, £70 less. The latest price cut was seen on 28 October 2026.

Price changes recorded:

• 23 October 2026: £19,570
• 24 October 2026: £19,540
• 28 October 2026: £19,500

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 13 October 2027.

It failed its MOT on 14 October 2026 (nearside front tyre has a tear, caused by separation or partial failure of its structure) and passed later the same day.

Advisories at the latest test: offside front tyre slightly damaged/cracking or perishing.

Mileage at that test: 57,492 miles, which matches the advertised 57,493 miles.

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

Similar cars

14 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 2 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, silver. Mileage: 57,920 miles. Price: £21,000, £1,500 more than this car. Dealer: Sytner Group Huddersfield Audi in Huddersfield. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-66e67805c111
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 54,000 miles. Price: £21,000, £1,500 more than this car. Dealer: GMC Cars Online in Crawley. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-67b0f5f6c031
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, blue. Mileage: 61,487 miles. Price: £17,795, £1,705 less than this car. Dealer: Tenby Car Supermarket in Luton. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-eb3afca4fd07