2021 Audi S4 Avant prices
There are 4 used 2021 Audi S4 Avant cars for sale from UK dealers on AskCar, as of 8 November 2026. The cheapest is £28,990.
Dealers lowered the asking price on more than a third of 2021 Audi S4 Avant cars: 2 of the 4 in the 14 days to 8 November 2026.
2021 Audi S4 Avant against other years
A 2020 Audi S4 Avant car has a typical asking price of £27,000, as of 8 November 2026.
AskCar lists 129 used Audi S4 Avant across the UK, from 117 dealerships.
As of 8 November 2026, AskCar lists 595,629 cars and vans from 12,891 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.
2021 Audi S4 Avant cars for sale now
This page picks out up to 10 cars in each of these groups: best value, cheapest, lowest mileage and recently reduced. A car in more than one group is listed in full once. The groups pick only from cars with photos and an AskCar estimate, priced at £500 or more and no more than 25% under that estimate. All 3 cars listed here meet these rules.
The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 128 priced Audi S4 Avant adverts on AskCar as of 8 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2021 Audi S4 Avant.
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.
Best value 2021 Audi S4 Avant: priced furthest below the AskCar estimate
Their asking prices run from £29,400 to £38,850.
- 2021 Audi S4 Avant 3.0 TDI V6 Black Edition, automatic, diesel, estate, 5 doors, blue. Mileage: 53,640 miles. Price: £29,400, reduced by £500 from £29,900 since AskCar first saw it on 15 October 2026, 24 days ago. Fair price: £516 (1%) over the AskCar estimate of £28,884. Euro 6 emissions standard. ULEZ compliant. MOT: valid until 29 March 2027. Dealer: Sytner Select Nottingham in Nottingham. AskCar page: https://askcar.co.uk/car/audi-s4-avant-2021-819f7423683d
- 2021 Audi S4 Avant 3.0 Vorsprung, 336 bhp, automatic, diesel, estate, 5 doors, grey. Mileage: 30,000 miles. Price: £38,850, reduced by £100 from £38,950 since AskCar first saw it on 24 September 2026, 45 days ago. Fair price: £1,734 (4%) over the AskCar estimate of £37,116. Euro 6 emissions standard. ULEZ compliant. MOT: valid until 27 May 2027. Dealer: Lodge Motor Co in Yateley. AskCar page: https://askcar.co.uk/car/audi-s4-avant-2021-c9d3010fd63d
- 2021 Audi S4 Avant 3.0 Black Edition, 336 bhp, automatic, diesel, estate, 5 doors, grey. Mileage: 40,076 miles. Price: £35,995, unchanged since AskCar first saw it on 25 September 2026, 44 days ago. Fair price: £2,019 (5%) over the AskCar estimate of £33,976. Euro 6 emissions standard. ULEZ compliant. MOT: valid until 5 December 2026. Dealer: Autocentre Inverurie in Inverurie. AskCar page: https://askcar.co.uk/car/audi-s4-avant-2021-8db656412822
Cheapest 2021 Audi S4 Avant: the lowest asking prices
These 3 are priced £29,400 to £38,850. They have covered 30,000 to 53,640 miles.
- 2021 Audi S4 Avant 3.0 TDI V6 Black Edition: £29,400, 53,640 miles. Listed in full under best value.
- 2021 Audi S4 Avant 3.0 Black Edition: £35,995, 40,076 miles. Listed in full under best value.
- 2021 Audi S4 Avant 3.0 Vorsprung: £38,850, 30,000 miles. Listed in full under best value.
Lowest-mileage 2021 Audi S4 Avant
These 3 have covered 30,000 to 53,640 miles. Their asking prices run from £29,400 to £38,850.
- 2021 Audi S4 Avant 3.0 Vorsprung: £38,850, 30,000 miles. Listed in full under best value.
- 2021 Audi S4 Avant 3.0 Black Edition: £35,995, 40,076 miles. Listed in full under best value.
- 2021 Audi S4 Avant 3.0 TDI V6 Black Edition: £29,400, 53,640 miles. Listed in full under best value.
Recently reduced 2021 Audi S4 Avant: the biggest price reductions in the 14 days to 8 November 2026
The dealer lowered the asking price on each of these 2 in the 14 days to 8 November 2026. Their reductions since AskCar first saw them run from £100 to £500.
- 2021 Audi S4 Avant 3.0 TDI V6 Black Edition: £29,400, 53,640 miles. Listed in full under best value.
- 2021 Audi S4 Avant 3.0 Vorsprung: £38,850, 30,000 miles. Listed in full under best value.
Audi S4 Avant by gearbox, fuel and body
Audi S4 Avant prices by year
Audi S4 Avant by trim
Audi S4 Avant by price
Audi S4 Avant near you
- In England (107 cars)
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