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: 46,270 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 46,270 miles, approximately 8,000 below the typical mileage for its age. Its asking price of £20,999 is £446 below the AskCar estimate of £21,445. To work out the AskCar estimate, we analyse UK dealer adverts for 876 Audi A6 Saloon cars across different ages and specifications. This car was first seen in our listings data today. We checked its advertised mileage against the government's MOT record, and they match. The seller is Ron Skinner & Sons (Tredegar), based in Tredegar. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 10 November 2026.

How we estimate prices and check cars

Price

Fair price: £446 (2%) under the AskCar estimate of £21,445.

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 876 priced Audi A6 Saloon adverts across different ages and specifications, as of 10 November 2026.

A 2021 Audi A6 Saloon with the 2.0 diesel engine is typically advertised at £18,600: the median of the 78 for sale on AskCar, as of 10 November 2026.

Time on sale

AskCar first saw this 2021 Audi A6 Saloon advertised today. About 4 in 10 of 2021 Audi A6 Saloon cars are gone from sale within a month of being advertised: 43 of the 104 first advertised between 13 July 2026 and 7 October 2026.

Price history

AskCar first saw this advert on 10 November 2026 at £20,999. 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 10 November 2026: valid until 28 September 2027.

It has had 3 MOTs. The latest, on 24 September 2026, passed.

Advisories at the latest test: nearside rear brake pad(s) wearing thin.

Mileage at that test: 45,752 miles, which matches the advertised 46,270 miles.

Advertised mileage is about 8,000 miles lower than the median mileage of a 2021 Audi A6 Saloon on AskCar.

Similar cars

12 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 10 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, £1,099 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, 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
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, grey. Mileage: 57,493 miles. Price: £19,040, £1,959 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