2020 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: 2020
• Mileage: 45,420 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 2020 Audi A6 Saloon S Line has covered 45,420 miles, around 11,900 fewer miles than is typical for its age. The AskCar estimate for this car is £19,725. It is priced at £14,990, which is £4,735 below that estimate. The AskCar estimate uses UK dealer asking prices, including 858 Audi A6 Saloon adverts, and accounts for the car’s age, mileage and specification. We have tracked this advert for 17 days. Its advertised mileage matches the government's MOT record. The seller is B&T Autos, based in Rainham. 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

Good value: £4,735 (24%) under the AskCar estimate of £19,725.

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 2020 Audi A6 Saloon with the 2.0 diesel engine is typically advertised at £18,000: the median of the 53 for sale on AskCar, as of 2 November 2026.

Time on sale

This 2020 Audi A6 Saloon has been on sale for at least 17 days.

Price history

AskCar first saw this advert on 16 October 2026 at £14,990. 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 2 November 2026: valid until 29 September 2027.

It has had 4 MOTs. The latest, on 30 September 2026, passed.

There were no advisories at the latest test.

Mileage at that test: 45,356 miles, which matches the advertised 45,420 miles.

Advertised mileage is about 11,900 miles lower than the median mileage of a 2020 Audi A6 Saloon on AskCar.

Similar cars

16 other 2020 Audi A6 Saloon S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £13,595 to £21,999, as of 2 November 2026.

The 3 closest to this car in mileage:

• 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, grey. Mileage: 47,106 miles. Price: £19,890, £4,900 more than this car. Dealer: Stratstone Halesowen Audi in Halesowen. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-949f411cd867
• 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, white. Mileage: 43,500 miles. Price: £19,750, £4,760 more than this car. Dealer: Swansway Garages Stoke Audi in Stoke-on-Trent. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-c66427c5db2a
• 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, grey. Mileage: 49,700 miles. Price: £18,490, £3,500 more than this car. Dealer: S James Prestige in Essendine. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-0b86dec653a6

• The nearest: 2020 Audi A6 Saloon S Line, 2.0 diesel saloon, white, 15 miles from this car. Mileage: 34,000 miles. Price: £19,950, £4,960 more than this car. Dealer: Westleigh Prestige in Wickford. AskCar page: https://askcar.co.uk/car/audi-a6-saloon-2020-94b6449627b2