2021 Audi A4 S Line prices
There are 21 used 2021 Audi A4 S Line cars for sale from UK dealers on AskCar, as of 11 November 2026. Typical asking price £16,900 (the median: half cost less, half cost more). The cheapest is £12,995. The middle half are priced between £16,500 and £19,000. Median mileage: about 47,000 miles.
Dealers lowered the asking price on more than a quarter of 2021 Audi A4 S Line cars: 7 of the 21 in the 14 days to 11 November 2026.
2021 Audi A4 S Line prices by engine and mileage
| Engine | All mileages | Under 20,000 miles | 20,000 to 40,000 miles | 40,000 to 60,000 miles | 60,000 miles or more |
|---|---|---|---|---|---|
| 2.0 diesel | £16,900 | Too few for sale | Too few for sale | Too few for sale | Too few for sale |
Typical asking prices are of 2021 Audi A4 S Line cars for sale on 11 November 2026, and are given only where at least 20 cars with a price are for sale.
2021 Audi A4 S Line against other years
A 2022 Audi A4 S Line car has a typical asking price of £18,900, as of 11 November 2026.
AskCar lists 1,434 used Audi A4 across the UK, from 965 dealerships.
As of 11 November 2026, AskCar lists 593,449 cars and vans from 12,847 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.
2021 Audi A4 S Line cars for sale now, page 2 of 2
This page lists 2021 Audi A4 S Line cars not picked out on page 1, cheapest first.
The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 1,386 priced Audi A4 adverts on AskCar as of 11 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2021 Audi A4 S Line.
Each car: year, make, model, engine and trim, power, gearbox, fuel, body, doors, colour; mileage; price and its changes; how the price compares with the AskCar estimate; emissions standard and ULEZ compliance where it holds; MOT; dealer and town; AskCar page. Each car's AskCar page has its full price history and cheaper cars like it.
This list leaves out 1 car whose advertised mileage is lower than the mileage recorded at its last MOT test.
- 2021 Audi A4 2.0 TFSI S Line, 148 bhp, automatic, petrol, saloon, 4 doors, black. Mileage: 47,400 miles. Price: £17,490, reduced by £500 from £17,990 since AskCar first saw it on 23 September 2026, 49 days ago. Fair price: £621 (3%) over the AskCar estimate of £16,869. Euro 6 emissions standard. ULEZ compliant. MOT: valid until 1 August 2027. Dealer: Stow Car Company in Chelmsford. AskCar page: https://askcar.co.uk/car/audi-a4-2021-16627277c0b6
Audi A4 by gearbox, fuel and body
- Automatic Audi A4 (1,016 cars)
- Manual Audi A4 (388 cars)
- Petrol Audi A4 (841 cars)
- Diesel Audi A4 (573 cars)
- Audi A4 estate (53 cars)
Audi A4 prices by year
- 2024 (108 cars)
- 2023 (217 cars)
- 2022 (110 cars)
- 2021 (88 cars)
- 2020 (99 cars)
- 2019 (152 cars)
- 2018 (101 cars)
- 2017 (130 cars)
- 2016 (152 cars)
- 2015 (62 cars)
- 2014 (65 cars)
- 2013 (52 cars)
- 2012 (27 cars)
Audi A4 by trim
- Audi A4 S Line (504 cars)
- Audi A4 Black Edition (371 cars)
- Audi A4 Sport (161 cars)
- Audi A4 Technik (86 cars)
- Audi A4 SE (83 cars)
- Audi A4 SE Technik (50 cars)
- Audi A4 Sport Edition (34 cars)
2021 Audi A4 by trim
Audi A4 by price
- Under £3,000 (32 cars)
- Under £5,000 (100 cars)
- Under £8,000 (295 cars)
- Under £10,000 (447 cars)
- Under £15,000 (776 cars)
- Under £20,000 (1,146 cars)
Audi A4 near you
- In England (1,157 cars)
- In Scotland (125 cars)
- In Wales (57 cars)
- In Northern Ireland (80 cars)
- Near London (168 cars)
- Near Barnet (166 cars)
- Near Watford (164 cars)
- Near Richmond upon Thames (146 cars)
- Near Egham (144 cars)
- Near Hillingdon (143 cars)
- Near Bolton (140 cars)
- Near Rochdale (135 cars)
- Near Berkhamsted (129 cars)
- Near Manchester (120 cars)
- Near Sutton (120 cars)
- Near Wigan (120 cars)
- Near Hale (120 cars)
- Near Luton (113 cars)
- Near Burnley (111 cars)
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