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: 69,960 miles
• Fuel: Diesel
• Body: Saloon, 4 doors, 5 seats
• Engine: 2.0 litres, 160 bhp
• Gearbox: Automatic (S tronic)
• Drive: Front-wheel drive
• Colour: White
• CO2: 137 g/km
• Emissions standard: Euro 6, ULEZ compliant

About this car

At 69,960 miles, this 2021 Audi A4 S Line has covered about 19,800 more miles than other 2021 Audi A4 cars. The AskCar estimate for this car is £15,699. It is priced at £15,498, which is £201 below that estimate. The AskCar estimate draws on 1,427 Audi A4 adverts across the UK, adjusting for age, mileage, trim, engine and other specifications. We first saw this car advertised 35 days ago. Its asking price has since fallen by £500. We checked its advertised mileage against the government's MOT record, and they match. The seller is Arnold Clark Cumbernauld Kia, based in Cumbernauld. 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: £201 (1%) under the AskCar estimate of £15,699.

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 35 days.

Price history

AskCar first saw this advert on 30 September 2026 at £15,998. Its asking price is now £15,498, £500 less. The latest price cut was seen on 11 October 2026.

Price changes recorded:

• 30 September 2026: £15,998
• 11 October 2026: £15,498

Mileage and MOT

MOT, from the government's MOT records (DVSA, the Driver and Vehicle Standards Agency), as of 4 November 2026: valid until 20 September 2027.

It has had 5 MOTs. The latest, on 21 September 2026, passed.

Advisories at the latest test: nearside front tyre worn close to legal limit/worn on edge 235/40/19 96w.

Mileage at that test: 69,965 miles, which matches the advertised 69,960 miles.

Advertised mileage is about 19,800 miles higher 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, black. Mileage: 64,000 miles. Price: £16,769, £1,271 more than this car. Dealer: Newarth Car Sales in Worsley. AskCar page: https://askcar.co.uk/car/audi-a4-2021-4f6db3642494
• 2021 Audi A4 S Line, 2.0 diesel saloon, white. Mileage: 62,800 miles. Price: £16,693, £1,195 more than this car. Dealer: Aylesbury Trade Centre in Aston Clinton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-ed55683643f9
• 2021 Audi A4 S Line, 2.0 diesel saloon, black. Mileage: 62,284 miles. Price: £16,799, £1,301 more than this car. Dealer: TU Motors in Luton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-d657172cf74a

• The nearest: 2021 Audi A4 S Line, 2.0 diesel saloon, grey, 11 miles from this car. Mileage: 36,347 miles. Price: £19,495, £3,997 more than this car. Dealer: Lookers Audi Hamilton in Hamilton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-4d7a04745f52