2021 Audi A4 2.0 TDI S Line
Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
Price: £19,495. Fair price: £255 (1%) over the AskCar estimate of £19,240, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,403 priced Audi A4 adverts on AskCar as of 1 November 2026.
AskCar lists 1,461 used Audi A4 from 957 UK dealerships, as of 1 November 2026.
Overview
- Make
- Audi
- Model
- A4
- Trim
- S Line
- Version
- 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
- Mileage
- 36,347 miles
- Year
- 2021
- Fuel type
- Diesel
- Body type
- Saloon
- Engine
- 2.0 L
- Gearbox
- Automatic
- Power
- 160 bhp
- Seats
- 5
- CO2
- 137 g/km
- Colour
- Grey
- Doors
- 4
- Driven wheels
- Front Wheel Drive
- Gearbox version
- S tronic
- Engine badge
- TDI
- Emissions standard
- Euro 6
About this car
This 2021 Audi A4 S Line has covered 36,347 miles, around 14,100 fewer miles than is typical for its age. Priced at £19,495, it is advertised £255 above the AskCar estimate of £19,240. To work out the AskCar estimate, we analyse UK dealer adverts for 1,403 Audi A4 cars across different ages and specifications. We have tracked this advert today. MOT records show an expiry date of 5 May 2027, and the latest recorded mileage is consistent with the advert. The seller is Lookers Audi Hamilton, based in Hamilton.
Stock data as of 1 November 2026.
Price history
AskCar first saw this advert on 1 November 2026.
| Date observed | Asking price |
|---|---|
| 1 November 2026 | £19,495 |
Price and mileage comparison
Fair price: £255 (1%) over the AskCar estimate of £19,240.
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 1,403 priced Audi A4 adverts across different ages and specifications, as of 1 November 2026.
Advertised mileage is about 14,100 miles lower than the median mileage of a 2021 Audi A4 on AskCar.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 5 May 2027. 32,476 miles at the last test.
Other matching cars
16 other 2021 Audi A4 S Line automatic diesel cars are for sale at UK dealers from £12,995 to £20,495, as of 1 November 2026.
The 5 cheapest:
- 2021 Audi A4. Price: £12,995. Mileage: 101,094 miles. Dealer: Tenby Car Supermarket in Luton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-267de4b8f370
- 2021 Audi A4. Price: £15,000. Mileage: 70,339 miles. Dealer: Carsa Wolverhampton in Wolverhampton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-659961e627a9
- 2021 Audi A4. Price: £15,498. Mileage: 69,960 miles. Dealer: Arnold Clark Cumbernauld Kia in Cumbernauld. AskCar page: https://askcar.co.uk/car/audi-a4-2021-f489aca9ff93
- 2021 Audi A4. Price: £15,500. Mileage: 78,000 miles. Dealer: Mylson Stoke in Newcastle-under-Lyme. AskCar page: https://askcar.co.uk/car/audi-a4-2021-a2ad2dde85f8
- 2021 Audi A4. Price: £16,693. Mileage: 62,800 miles. Dealer: Aylesbury Trade Centre in Aston Clinton. AskCar page: https://askcar.co.uk/car/audi-a4-2021-ed55683643f9
The 16 matching cars have covered 20,800 to 101,094 miles, compared with 36,347 miles for this car.
Matching year, trim, gearbox and fuel does not mean matching mileage or every specification. The AskCar estimate adjusts for these differences.
Browse all Audi A4 cars for sale · 2021 Audi A4 price guide
More like this
Photos
6 photos of this car are on its AskCar page.
How to contact the dealer and its opening hours are on this AskCar page.
As of 1 November 2026, AskCar lists 578,994 cars and vans from 12,654 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.