2021 Audi A4 2.0 TDI S Line

Overview

• Make: Audi
• Model: A4
• Trim: S Line
• Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
• Year: 2021
• Mileage: 38,930 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 160 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: Blue
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

This 2021 Audi A4 S Line has covered 38,930 miles, around 11,300 fewer miles than is typical for its age. Priced at £18,299, it is advertised £668 below the AskCar estimate of £18,967. The AskCar estimate draws on 1,427 Audi A4 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first recorded this advert 26 days ago, and its asking price has since fallen by £750. According to the government's MOT record, its advertised mileage is consistent with the latest test. The seller is Motorpoint Edinburgh, based in Edinburgh. How to contact the dealer and its opening hours are on this AskCar page.

Stock data as of 4 November 2026.

How we estimate prices and check cars

Price

Fair price: £668 (3%) under the AskCar estimate of £18,967.

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 1,427 priced Audi A4 adverts across different ages and specifications, as of 4 November 2026.

A 2021 Audi A4 with the 2.0 diesel engine is typically advertised at £17,100: the median of the 95 for sale on AskCar, as of 4 November 2026.

Time on sale

This 2021 Audi A4 has been on sale for at least 26 days.

Price history

AskCar first saw this advert on 9 October 2026 at £19,049. Its asking price is now £18,299, £750 less. The latest price cut was seen on 29 October 2026.

Price changes recorded:

• 9 October 2026: £19,049
• 10 October 2026: £18,249
• 15 October 2026: £18,299
• 22 October 2026: £18,349
• 29 October 2026: £18,299

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 6 July 2027.

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

There were no advisories at the latest test.

Mileage at that test: 37,349 miles, which matches the advertised 38,930 miles.

Advertised mileage is about 11,300 miles lower than the median mileage of a 2021 Audi A4 on AskCar.

Similar cars

16 other 2021 Audi A4 S Line 2.0 diesel automatic saloons are for sale at UK dealers, from £12,995 to £20,495, as of 4 November 2026.

The 3 closest to this car in mileage:

• 2021 Audi A4 S Line, 2.0 diesel saloon, blue. Mileage: 37,000 miles. Price: £17,995, £304 less than this car. Dealer: Auto 2000 in Havering. AskCar page: https://askcar.co.uk/car/audi-a4-2021-6e30f932d50e
• 2021 Audi A4 S Line, 2.0 diesel saloon, grey. Mileage: 36,347 miles. Price: £19,495, £1,196 more than this car. Dealer: Lookers Audi Hamilton in Hamilton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-4d7a04745f52
• 2021 Audi A4 S Line, 2.0 diesel saloon, black. Mileage: 44,514 miles. Price: £17,599, £700 less than this car. Dealer: Motorpoint Birtley in Birtley. AskCar page: https://askcar.co.uk/car/audi-a4-2021-7bbc75ccb0eb

• The nearest: 2021 Audi A4 S Line, 2.0 diesel saloon, white, 33 miles from this car. Mileage: 69,960 miles. Price: £15,498, £2,801 less than this car. Dealer: Arnold Clark Cumbernauld Kia in Cumbernauld. AskCar page: https://askcar.co.uk/car/audi-a4-2021-f489aca9ff93