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: 69,561 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Black
• CO2: 142 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A6 Saloon S Line is advertised with 69,561 miles, approximately 12,500 above the typical mileage for its age. Priced at £18,498, it is advertised £423 below the AskCar estimate of £18,921. The AskCar estimate draws on 858 Audi A6 Saloon adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 37 days ago. Its asking price has since fallen by £1,500. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Arnold Clark Glasgow Bishopbriggs MG, based in Glasgow. 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: £423 (2%) under the AskCar estimate of £18,921.

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 37 days.

Price history

AskCar first saw this advert on 26 September 2026 at £19,998. Its asking price is now £18,498, £1,500 less. The latest price cut was seen on 22 October 2026.

Price changes recorded:

• 26 September 2026: £19,998
• 15 October 2026: £18,998
• 22 October 2026: £18,498

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 24 September 2027.

It has had 5 MOTs. The latest, on 25 September 2026, passed.

Advisories at the latest test: offside rear coil spring mounting corroded but not seriously weakened.

Mileage at that test: 69,565 miles, which matches the advertised 69,561 miles.

Advertised mileage is about 12,500 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, grey. Mileage: 72,952 miles. Price: £17,995, £503 less than this car. Dealer: Motorzone Durham in Durham. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-82c9426ff337
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 75,342 miles. Price: £19,490, £992 more than this car. Dealer: Fermanagh Auto Sales in Enniskillen. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-93b403df75b2
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, blue. Mileage: 75,378 miles. Price: £17,699, £799 less than this car. Dealer: cinch Corby in Corby. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-b239d25d51d8

• The nearest: 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, white, 49 miles from this car. Mileage: 82,000 miles. Price: £18,000, £498 less than this car. Dealer: Alistair Buchan in East Wemyss. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-5f385f15c136