2021 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 4WD Euro 6 (s/s) 4dr (201 bhp)
• Year: 2021
• Mileage: 57,920 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 201 bhp
• Gearbox: Automatic (S tronic)
• Drive: Four-wheel drive
• Colour: Silver
• CO2: 147 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

With 57,920 miles on the clock, this 2021 Audi A6 Saloon S Line has done roughly 3,100 more miles than a typical 2021 Audi A6 Saloon. The dealer is asking £21,000, which is £458 below the AskCar estimate of £21,458. To work out the AskCar estimate, we analyse UK dealer adverts for 871 Audi A6 Saloon cars across different ages and specifications. We first saw this car advertised 55 days ago. Its asking price has since fallen by £500. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Sytner Group Huddersfield Audi, based in Huddersfield. 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: £458 (2%) under the AskCar estimate of £21,458.

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 2021 Audi A6 Saloon with the 2.0 diesel engine is typically advertised at £18,400: the median of the 81 for sale on AskCar, as of 5 November 2026.

Time on sale

This 2021 Audi A6 Saloon has been on sale for at least 55 days.

Price history

AskCar first saw this advert on 11 September 2026 at £21,500. Its asking price is now £21,000, £500 less. The latest price cut was seen on 26 October 2026.

Price changes recorded:

• 11 September 2026: £21,500
• 26 October 2026: £21,000

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 5 November 2026: valid until 9 April 2027.

It has had 3 MOTs. The latest, on 10 April 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 53,188 miles, which matches the advertised 57,920 miles.

Advertised mileage is about 3,100 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 5 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, grey. Mileage: 57,493 miles. Price: £19,290, £1,710 less than this car. Dealer: Big Motoring World Blue Bell Hill in Blue Bell Hill. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-6f5f3f711b1f
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, blue. Mileage: 61,487 miles. Price: £17,795, £3,205 less than this car. Dealer: Tenby Car Supermarket in Luton. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-eb3afca4fd07
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 54,000 miles. Price: £21,000, the same price as this car. Dealer: GMC Cars Online in Crawley. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-67b0f5f6c031

• The nearest: 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black, 18 miles from this car. Mileage: 92,280 miles. Price: £16,995, £4,005 less than this car. Dealer: Blackline Motors in Oldham. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-6b893042a43b