2020 Audi A3 S Line prices

There are 123 used 2020 Audi A3 S Line cars for sale from UK dealers on AskCar, as of 9 November 2026. Typical asking price £16,200 (the median: half cost less, half cost more). The cheapest is £10,995. The middle half are priced between £14,500 and £17,400. Median mileage: about 48,000 miles.

Dealers lowered the asking price on more than a third of 2020 Audi A3 S Line cars: 50 of the 123 in the 14 days to 9 November 2026.

2020 Audi A3 S Line prices by engine and mileage

A 2020 Audi A3 S Line 1.5 petrol car typically costs £16,500, against £16,000 for the 2.0 diesel, as of 9 November 2026.

A 2020 Audi A3 S Line 1.5 petrol car with 20,000 to 40,000 miles typically costs £17,000, against £16,300 with 40,000 to 60,000 miles.

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
1.5 petrol£16,500Too few for sale£17,000£16,300Too few for sale
2.0 diesel£16,000Too few for saleToo few for saleToo few for saleToo few for sale

Only 17 of the 2020 Audi A3 S Line cars for sale have the 1.0 petrol engine, too few to give a typical asking price.

Only 4 of the 2020 Audi A3 S Line cars for sale have the 1.4 plug-in hybrid engine, too few to give a typical asking price.

Only 1 of the 2020 Audi A3 S Line cars for sale have the 1.6 diesel engine, too few to give a typical asking price.

Typical asking prices are of 2020 Audi A3 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 A3 S Line against other years

A 2019 Audi A3 S Line car has a typical asking price of £13,800 and a 2021 one £17,000, as of 9 November 2026.

AskCar lists 6,708 used Audi A3 across the UK, from 2,266 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 A3 S Line cars for sale now, page 2 of 3

This page lists 2020 Audi A3 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 6,554 priced Audi A3 adverts on AskCar as of 9 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2020 Audi A3 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 2 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

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