2021 Audi A6 Saloon 2.0 TDI S Line
Price: £21,000. Fair price: £1,011 (4%) under the AskCar estimate of £22,011, our expected asking price for this car from its model, age, mileage and specification, drawing on 874 priced Audi A6 Saloon adverts on AskCar as of 4 November 2026.
AskCar lists 905 used Audi A6 Saloon from 660 UK dealerships, as of 4 November 2026.
Overview
- Make: Audi
- Model: A6 Saloon
- Trim: S Line
- Version: 2.0 TDI S Line S tronic 4WD Euro 6 4dr (201 bhp)
- Year: 2021
- Mileage: 54,000 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 2.0 litres, 201 bhp
- Gearbox: Automatic (S tronic)
- Drive: Four-wheel drive
- Colour: Black
- CO2: 147 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
At 54,000 miles, this 2021 Audi A6 Saloon S Line has covered about 2,600 fewer miles than other 2021 Audi A6 Saloon cars. The AskCar estimate for this car is £22,011. It is priced at £21,000, which is £1,011 below that estimate. The AskCar estimate uses UK dealer asking prices, including 874 Audi A6 Saloon adverts, and accounts for the car’s age, mileage and specification. This car was first seen in our listings data 26 days ago. Its advertised mileage matches the government's MOT record. It is for sale at GMC Cars Online in Lingfield. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £1,011 (4%) under the AskCar estimate of £22,011.
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 26 days.
Price history
AskCar first saw this advert on 9 October 2026 at £21,000. 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 4 November 2026: valid until 1 May 2027.
It has had 3 MOTs. The latest, on 20 April 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 50,311 miles, which matches the advertised 54,000 miles.
Advertised mileage is about 2,600 miles lower 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: 52,755 miles. Price: £19,900, £1,100 less than this car. Dealer: Sytner Select Swindon in Swindon. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-948ef085ac79
- 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, silver. Mileage: 57,920 miles. Price: £21,000, the same price as this car. Dealer: Sytner Group Huddersfield Audi in Huddersfield. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-66e67805c111
Browse all Audi A6 Saloon cars for sale · 2021 Audi A6 Saloon price guide
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Photos
40 photos of this car are on its AskCar page.
As of 4 November 2026, AskCar lists 592,552 cars and vans from 12,964 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.