2021 Audi A4 Avant 2.0 TDI S Line
Version: 2.0 TDI S Line S tronic FWD Euro 6 5dr (160 bhp)
Price: £22,000. Fair price: £1,249 (5%) under the AskCar estimate of £23,249, our expected asking price for this car from its model, age, mileage and specification, drawing on 1,204 priced Audi A4 Avant adverts on AskCar as of 30 October 2026.
AskCar lists 1,243 used Audi A4 Avant from 825 UK dealerships, as of 30 October 2026.
Overview
- Make
- Audi
- Model
- A4 Avant
- Trim
- S Line
- Version
- 2.0 TDI S Line S tronic FWD Euro 6 5dr (160 bhp)
- Mileage
- 18,925 miles
- Year
- 2021
- Fuel type
- Diesel
- Body type
- Estate
- Engine
- 2.0 L
- Gearbox
- Automatic
- Power
- 160 bhp
- Seats
- 5
- CO2
- 142 g/km
- Colour
- Grey
- Doors
- 5
- Driven wheels
- Front Wheel Drive
- Gearbox version
- S tronic
- Engine badge
- TDI
- Hybrid type
- Mild hybrid
- Emissions standard
- Euro 6
About this car
With 18,925 miles on the clock, this 2021 Audi A4 Avant S Line has done roughly 40,800 fewer miles than a typical 2021 Audi A4 Avant. The dealer is asking £22,000, which is £1,249 below the AskCar estimate of £23,249. To work out the AskCar estimate, we analyse UK dealer adverts for 1,204 Audi A4 Avant cars across different ages and specifications. This car was first seen in our listings data today. Its recorded MOT is valid until 29 June 2027, and its advertised mileage is consistent with the latest MOT reading. The seller is Car Planet Watford, based in Rickmansworth.
Stock data as of 30 October 2026.
Price history
AskCar first saw this advert on 30 October 2026.
| Date observed | Asking price |
|---|---|
| 30 October 2026 | £22,000 |
Price and mileage comparison
Fair price: £1,249 (5%) under the AskCar estimate of £23,249.
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 1,204 priced Audi A4 Avant adverts across different ages and specifications, as of 30 October 2026.
Advertised mileage is about 40,800 miles lower than the median mileage of a 2021 Audi A4 Avant on AskCar.
The advertised mileage is consistent with the last MOT reading.
MOT
MOT: valid until 29 June 2027. 18,845 miles at the last test.
Other matching cars
17 other 2021 Audi A4 Avant S Line automatic diesel cars are for sale at UK dealers from £8,999 to £22,000, as of 30 October 2026.
The 5 cheapest:
- 2021 Audi A4 Avant. Price: £8,999. Mileage: 179,190 miles. Dealer: Dereham Motor Company in Dereham. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-cb78a17bd4eb
- 2021 Audi A4 Avant. Price: £13,898. Mileage: 108,000 miles. Dealer: Westley Motor Company in Birmingham. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-a6013213f90b
- 2021 Audi A4 Avant. Price: £13,995. Mileage: 108,000 miles. Dealer: Enzo Cars & Vans in Blackburn. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-8873dff9afb5
- 2021 Audi A4 Avant. Price: £14,495. Mileage: 100,767 miles. Dealer: Stirling Motors in St Ives. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-2796ffaa44e7
- 2021 Audi A4 Avant. Price: £14,999. Mileage: 89,277 miles. Dealer: cinch Bellevue in Hook. AskCar page: https://askcar.co.uk/car/audi-a4-avant-2021-be96804773ba
The 17 matching cars have covered 31,036 to 179,190 miles, compared with 18,925 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 Avant cars for sale · 2021 Audi A4 Avant price guide
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Photos
1 photo of this car is on its AskCar page.
How to contact the dealer and its opening hours are on this AskCar page.
As of 30 October 2026, AskCar lists 580,490 cars and vans from 12,695 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.