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 4WD Euro 6 4dr (201 bhp)
• Year: 2021
• Mileage: 97,450 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

This 2021 Audi A6 Saloon S Line is advertised with 97,450 miles, approximately 40,400 above the typical mileage for its age. Priced at £16,495, it is advertised £64 below the AskCar estimate of £16,559. The AskCar estimate uses 858 UK dealer adverts for the Audi A6 Saloon, with adjustments for age, mileage, trim, engine and other specifications. We first saw this car advertised 74 days ago. Its asking price has since fallen by £795. We checked its advertised mileage against the government's MOT record, and they match. It is for sale at Select Car Superstore in Peterborough. 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: £64 (under 1%) under the AskCar estimate of £16,559.

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 74 days.

Price history

AskCar first saw this advert on 20 August 2026 at £17,290. Its asking price is now £16,495, £795 less. The latest price cut was seen on 21 October 2026.

Price changes recorded:

• 20 August 2026: £17,290
• 28 August 2026: £17,195
• 26 September 2026: £16,990
• 21 October 2026: £16,495

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 2 November 2026: valid until 20 April 2027.

It has had 4 MOTs. The latest, on 24 March 2026, passed.

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

Mileage at that test: 91,740 miles, which matches the advertised 97,450 miles.

Advertised mileage is about 40,400 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, black. Mileage: 92,280 miles. Price: £16,995, £500 more than this car. Dealer: Blackline Motors in Oldham. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-6b893042a43b
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, blue. Mileage: 91,045 miles. Price: £15,770, £725 less than this car. Dealer: Evans Halshaw Ford Blackpool in Blackpool. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-5f042feb4b9c
• 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black. Mileage: 82,640 miles. Price: £18,495, £2,000 more than this car. Dealer: Comiskey Motors in Newry. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-db6063569ca9

• The nearest: 2021 Audi A6 Saloon S Line, 2.0 diesel saloon, black, 3 miles from this car. Mileage: 79,921 miles. Price: £16,400, £95 less than this car. Dealer: Carworld Car Supermarket in Peterborough. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2021-fa93dd72f012