2018 Audi S5 prices

There are 62 used 2018 Audi S5 cars for sale from UK dealers on AskCar, as of 5 November 2026. Typical asking price £20,500 (the median: half cost less, half cost more). The cheapest is £14,990. The middle half are priced between £18,800 and £22,500. Median mileage: about 67,000 miles.

Dealers lowered the asking price on more than a quarter of 2018 Audi S5 cars: 18 of the 62 in the 14 days to 5 November 2026.

2018 Audi S5 prices by engine and mileage

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
3.0 petrol£20,500Too few for saleToo few for saleToo few for sale£19,300

Typical asking prices are of 2018 Audi S5 cars for sale on 5 November 2026, and are given only where at least 20 cars with a price are for sale.

2018 Audi S5 against other years

A 2017 Audi S5 car has a typical asking price of £19,100, as of 5 November 2026.

AskCar lists 373 used Audi S5 across the UK, from 298 dealerships.

As of 5 November 2026, AskCar lists 595,776 cars and vans from 12,945 UK dealerships, read daily from dealer websites: over 99% of UK dealer used car adverts. No dealer pays to be listed.

2018 Audi S5 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. 55 of the 58 cars listed here meet these rules. Page 2 lists every other 2018 Audi S5 car, cheapest first, including the 3 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 360 priced Audi S5 adverts on AskCar as of 5 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2018 Audi S5.

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 4 cars whose advertised mileage is lower than the mileage recorded at their last MOT test.

Best value 2018 Audi S5: priced furthest below the AskCar estimate

These 10 are priced 4% to 14% under their AskCar estimate. Their asking prices run from £14,990 to £22,289.

Cheapest 2018 Audi S5: the lowest asking prices

These 10 are priced £14,990 to £17,995. They have covered 54,000 to 107,000 miles.

Lowest-mileage 2018 Audi S5

These 10 have covered 31,337 to 50,247 miles. Their asking prices run from £21,495 to £26,950.

Recently reduced 2018 Audi S5: the biggest price reductions in the 14 days to 5 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 5 November 2026. Their reductions since AskCar first saw them run from £879 to £3,000.

Newly advertised 2018 Audi S5: first seen by AskCar in the 7 days to 5 November 2026

These 9 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

Audi S5 by gearbox, fuel and body

Audi S5 prices by year

Audi S5 by trim

Audi S5 by price

Audi S5 near you

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