2021 Audi A4 2.0 TDI S Line
Price: £16,799. Fair price: £198 (1%) over the AskCar estimate of £16,601, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,427 priced Audi A4 adverts on AskCar as of 4 November 2026.
AskCar lists 1,488 used Audi A4 from 972 UK dealerships, as of 4 November 2026.
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: 62,284 miles
- Fuel: Diesel
- Body: Saloon, 4 doors, 5 seats
- Engine: 2.0 litres, 160 bhp
- Gearbox: Automatic (S tronic)
- Drive: Front-wheel drive
- Colour: Black
- CO2: 137 g/km
- Emissions standard: Euro 6, ULEZ compliant
About this car
At 62,284 miles, this 2021 Audi A4 S Line has covered about 12,100 more miles than other 2021 Audi A4 cars. The AskCar estimate for this car is £16,601. It is priced at £16,799, which is £198 above that estimate. To work out the AskCar estimate, we analyse UK dealer adverts for 1,427 Audi A4 cars across different ages and specifications. We have tracked this advert for 28 days. Its advertised mileage matches the government's MOT record. It is advertised by TU Motors in Luton. How to contact the dealer and its opening hours are on this AskCar page.
Stock data as of 4 November 2026.
Price
Fair price: £198 (1%) over the AskCar estimate of £16,601.
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 28 days.
Price history
AskCar first saw this advert on 7 October 2026 at £16,799. 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 4 November 2026: valid until 10 May 2027.
It has had 3 MOTs. The latest, on 9 May 2026, passed.
There were no advisories at the latest test.
Mileage at that test: 58,506 miles, which matches the advertised 62,284 miles.
Advertised mileage is about 12,100 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, white. Mileage: 62,800 miles. Price: £16,693, £106 less 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, grey. Mileage: 60,600 miles. Price: £17,250, £451 more than this car. Dealer: Igen Autos in Magherafelt. AskCar page: https://askcar.co.uk/car/audi-a4-2021-400b2694197e
- 2021 Audi A4 S Line, 2.0 diesel saloon, black. Mileage: 64,000 miles. Price: £16,769, the same price as this car. Dealer: Newarth Car Sales in Worsley. AskCar page: https://askcar.co.uk/car/audi-a4-2021-4f6db3642494
- The nearest: 2021 Audi A4 S Line, 2.0 diesel saloon, black, 3 miles from this car. Mileage: 101,094 miles. Price: £12,995, £3,804 less than this car. Dealer: Tenby Car Supermarket in Luton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-267de4b8f370
Browse all Audi A4 cars for sale · 2021 Audi A4 price guide
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Photos
76 photos of this car are on its AskCar page.
As of 4 November 2026, AskCar lists 592,552 cars and vans from 12,964 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.