2026 Kia K4 GT Line S prices

There are 111 used 2026 Kia K4 GT Line S cars for sale from UK dealers on AskCar, as of 9 November 2026. Typical asking price £25,500 (the median: half cost less, half cost more). The cheapest is £22,995. The middle half are priced between £25,000 and £27,000. Median mileage: about 4,000 miles.

Dealers lowered the asking price on more than a third of 2026 Kia K4 GT Line S cars: 48 of the 111 in the 14 days to 9 November 2026.

2026 Kia K4 GT Line S prices by engine and mileage

A 2026 Kia K4 GT Line S 1.6 petrol car typically costs £27,500, against £25,000 for the 1.0 petrol, as of 9 November 2026.

EngineAll mileagesUnder 20,000 miles20,000 to 40,000 miles40,000 to 60,000 miles60,000 miles or more
1.0 petrol£25,000£25,000Too few for saleToo few for saleToo few for sale
1.6 petrol£27,500£27,500Too few for saleToo few for saleToo few for sale

Typical asking prices are of 2026 Kia K4 GT Line S cars for sale on 9 November 2026, and are given only where at least 20 cars with a price are for sale.

AskCar lists 278 used Kia K4 across the UK, from 137 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.

2026 Kia K4 GT Line S cars for sale now, page 1 of 3

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. 110 of the 111 cars listed here meet these rules. Pages 2 to 3 list every other 2026 Kia K4 GT Line S 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 277 priced Kia K4 adverts on AskCar as of 9 November 2026. The figures on this page describe the cars advertised, not a valuation of every 2026 Kia K4 GT Line S.

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 2026 Kia K4 GT Line S: priced furthest below the AskCar estimate

These 10 are priced 5% to 11% under their AskCar estimate. Their asking prices run from £23,067 to £27,499.

Cheapest 2026 Kia K4 GT Line S: the lowest asking prices

These 10 are priced £22,995 to £23,685. They have covered 1,308 to 13,889 miles.

Lowest-mileage 2026 Kia K4 GT Line S

These 10 have covered 10 to 569 miles. Their asking prices run from £25,795 to £33,789.

Recently reduced 2026 Kia K4 GT Line S: the biggest price reductions in the 14 days to 9 November 2026

The dealer lowered the asking price on each of these 10 in the 14 days to 9 November 2026. Their reductions since AskCar first saw them run from £4,500 to £6,465.

Newly advertised 2026 Kia K4 GT Line S: first seen by AskCar in the 7 days to 9 November 2026

These 6 are the most recently advertised. Cars first seen on the same day are listed cheapest first.

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