2020 Audi A4 Avant S Line prices

There are 21 used 2020 Audi A4 Avant S Line cars for sale from UK dealers on AskCar, as of 9 November 2026. Typical asking price £16,800 (the median: half cost less, half cost more). The cheapest is £10,995. The middle half are priced between £15,400 and £17,500. Median mileage: about 65,000 miles.

Dealers lowered the asking price on more than one in five of 2020 Audi A4 Avant S Line cars: 5 of the 21 in the 14 days to 9 November 2026.

2020 Audi A4 Avant S Line prices by engine and mileage

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
2.0 petrol£16,800Too few for saleToo few for saleToo few for saleToo few for sale

Typical asking prices are of 2020 Audi A4 Avant S Line cars for sale on 9 November 2026, and are given only where at least 20 cars with a price are for sale.

2020 Audi A4 Avant S Line against other years

A 2019 Audi A4 Avant S Line car has a typical asking price of £15,500 and a 2021 one £18,000, as of 9 November 2026.

AskCar lists 1,265 used Audi A4 Avant across the UK, from 837 dealerships.

As of 9 November 2026, AskCar lists 584,619 cars and vans from 12,676 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2020 Audi A4 Avant S Line cars for sale now, page 1 of 2

This page picks out up to 10 cars in each of these groups: best value, cheapest, lowest mileage, recently reduced and newly advertised. 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. 20 of the 21 cars listed here meet these rules. Page 2 lists every other 2020 Audi A4 Avant S Line car, cheapest first, including the one the groups do not pick from.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 1,214 priced Audi A4 Avant adverts on AskCar as of 9 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2020 Audi A4 Avant 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.

Best value 2020 Audi A4 Avant S Line: priced furthest below the AskCar estimate

Their asking prices run from £13,987 to £22,995.

Cheapest 2020 Audi A4 Avant S Line: the lowest asking prices

These 10 are priced £10,995 to £16,750. They have covered 59,230 to 124,000 miles.

Lowest-mileage 2020 Audi A4 Avant S Line

These 10 have covered 11,600 to 62,216 miles. Their asking prices run from £15,900 to £22,995.

Recently reduced 2020 Audi A4 Avant S Line: the biggest price reductions in the 14 days to 9 November 2026

The dealer lowered the asking price on each of these 4 in the 14 days to 9 November 2026. Their reductions since AskCar first saw them run from £500 to £3,000.

Newly advertised 2020 Audi A4 Avant S Line: first seen by AskCar in the 7 days to 9 November 2026

These 3 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

Audi A4 Avant by gearbox, fuel and body

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