2021 Audi A4 2.0 TDI S Line
Version: 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
Price: £16,769. Fair price: £391 (2%) over the AskCar estimate of £16,378, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,413 priced Audi A4 adverts on AskCar as of 31 October 2026.
AskCar lists 1,470 used Audi A4 from 958 UK dealerships, as of 31 October 2026.
Overview
- Make
- Audi
- Model
- A4
- Trim
- S Line
- Version
- 2.0 TDI S Line S tronic FWD Euro 6 4dr (160 bhp)
- Mileage
- 64,000 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
- Black
- 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 64,000 miles. Priced at £16,769, it is advertised £391 above the AskCar estimate of £16,378. To work out the AskCar estimate, we analyse UK dealer adverts for 1,413 Audi A4 cars across different ages and specifications. It first appeared in our advert records 2 days ago. The last MOT shows 64,685 miles, more than the advert. This is worth checking with the dealer. Its MOT is recorded as valid until 22 October 2027. The seller is Newarth Car Sales, based in Manchester.
Stock data as of 31 October 2026.
Price history
AskCar first saw this advert on 29 October 2026, 2 days ago.
| Date observed | Asking price |
|---|---|
| 29 October 2026 | £16,769 |
| 31 October 2026 | £16,769 |
Price and mileage comparison
Fair price: £391 (2%) over the AskCar estimate of £16,378.
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 1,413 priced Audi A4 adverts across different ages and specifications, as of 31 October 2026.
Advertised mileage is about 13,400 miles higher than the median mileage of a 2021 Audi A4 on AskCar.
Mileage concern: the advertised mileage is below the last MOT reading; ask the dealer to explain.
MOT
MOT: valid until 22 October 2027. 64,685 miles at the last test.
Other matching cars
17 other 2021 Audi A4 S Line automatic diesel cars are for sale at UK dealers from £12,995 to £20,495, as of 31 October 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: £14,700. Mileage: 73,133 miles. Dealer: Alshikh Cars in Ilkeston. AskCar page: https://askcar.co.uk/car/audi-a4-2021-99ae9a430771
- 2021 Audi A4. Price: £15,000. Mileage: 70,339 miles. Dealer: Carsa Cannock in Cannock. 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
The 17 matching cars have covered 20,800 to 101,094 miles, compared with 64,000 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
34 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 31 October 2026, AskCar lists 583,548 cars and vans from 12,716 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.