Used Audi A3 S Line Competition prices

There are 51 used Audi A3 S Line Competition cars for sale from UK dealers on AskCar, as of 1 November 2026. Typical asking price £20,500 (the median: half cost less, half cost more). The cheapest is £13,000. The middle half are priced between £17,700 and £23,000.

Dealers lowered the asking price on more than half of Audi A3 S Line Competition cars: 26 of the 51 in the 14 days to 1 November 2026.

AskCar lists 6,654 used Audi A3 across the UK, from 2,245 dealerships.

As of 1 November 2026, AskCar lists 578,994 cars and vans from 12,654 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

Audi A3 S Line Competition 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. All 50 cars listed here meet these rules. Page 2 lists every other Audi A3 S Line Competition car, cheapest first.

The AskCar estimate is our expected asking price for that one car, from its model, age, mileage and specification, using the 6,516 priced Audi A3 adverts on AskCar as of 1 November 2026. The figures on this page describe the cars advertised, not a valuation of every Audi A3 S Line Competition.

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 Audi A3 S Line Competition: priced furthest below the AskCar estimate

These 10 are priced 4% to 9% under their AskCar estimate. Their asking prices run from £16,499 to £23,452.

Cheapest Audi A3 S Line Competition: the lowest asking prices

These 10 are priced £13,000 to £17,000. They have covered 64,000 to 113,000 miles.

Lowest-mileage Audi A3 S Line Competition

These 10 have covered 5,144 to 19,000 miles. Their asking prices run from £21,295 to £27,000.

Recently reduced Audi A3 S Line Competition: the biggest price reductions in the 14 days to 1 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 1 November 2026. Their reductions since AskCar first saw them run from £926 to £5,880.

Newly advertised Audi A3 S Line Competition: first seen by AskCar in the 7 days to 1 November 2026

These 4 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

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