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Kia K4 (GT-Line S) • 55 cars with analysis

Market overview: Market price for Kia K4 (GT-Line S): The average price is £26,229, ranging from £24,178 to £29,123. Among 55 cars with the GT-Line S trim, AutoUncle identified 2 good deals listed below market value.

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Carwow

GT-Line S

(2026) Kia K4 GT-Line S 179 HP

£26,395

Fair price

You save £1,005

RG14 7HT Berkshire, Berkshire

152 g CO2/km comb. - 179 HP (131 kW) - 6.8 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 115 HP

£24,239

Fair price

You save £1,061

NG1 3FS Nottingham, Nottinghamshire

132 g CO2/km comb. - 115 HP (84 kW) - 49.0 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 180 HP

£26,412

Good price

You save £1,388

NG1 3FS Nottingham, Nottinghamshire

152 g CO2/km comb. - 180 HP (132 kW) - 6.8 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 115 HP

£23,995

Fair price

You save £805

RG2 0ST Berkshire, Berkshire

132 g CO2/km comb. - 115 HP (84 kW) - 5.6 Mpg

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

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-15%

1 / 4

Used (2026) Kia K4 GT-Line S 180 HP | Good price

2026 GT-Line S 1.6T-GDi 180

Jan 2026
4,017 miles
Trim level: GT-Line S
1.6L Petrol
Hatchback
Automatic
180 HP (132 kW)
CO2 emissions: 152 g CO2/km comb.
6.8 mpg
Details

Good price

£26,412

£31,312

NG1 3FS Nottingham, Nottinghamshire

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1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Good price

1.0T-GDi 115 48V GT-Line S 5dr DCT

2026
2,117 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Good price

£24,239

£24,367

Dealer

London, London

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1 / 1

New (2026) Kia K4 GT-Line S 179 HP | Fair price

1.6T-GDi 180 GT-Line S 5dr DCT

2026
10 miles
Trim level: GT-Line S
1.6L Petrol
Hatchback
Automatic
179 HP (131 kW)
CO2 emissions: 152 g CO2/km comb.
6.6 mpg
Details

Fair price

£28,875

£28,680

London, London

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Availability verified

-17%

1 / 4

Used (2026) Kia K4 GT-Line S 114 HP | Fair price

2026 GT-Line S 1.0T-GDi 115 48V

2026
1,308 miles
Trim level: GT-Line S
1.2L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 132 g CO2/km comb.
49 mpg
Details

Fair price

£24,836

£29,988

S71 1EZ South Yorkshire, South Yorkshire

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Carwow Leasing

GT-Line S

(2026) Kia K4 GT-Line S 179 HP

£28,875

Fair price

Estimated price £28,252

London, London

152 g CO2/km comb. - 179 HP (131 kW) - 6.6 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 114 HP

£24,836

Fair price

You save £564

S71 1EZ South Yorkshire, South Yorkshire

132 g CO2/km comb. - 114 HP (83 kW) - 49.0 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 179 HP

£27,581

Fair price

You save £119

SS7 3NL Rayleigh, Essex

152 g CO2/km comb. - 179 HP (131 kW) - 6.6 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 115 HP

£24,888

Fair price

You save £312

S81 7AE Nottinghamshire, Nottinghamshire

132 g CO2/km comb. - 115 HP (84 kW) - 5.8 Mpg

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1 / 4

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

- 1.0T-GDi 115 48V GT-Line S 5dr

2026
6,327 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
5.8 mpg
Details

Fair price

£24,888

£27,990

S81 7AE Nottinghamshire, Nottinghamshire

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-2%

1 / 4

Used (2026) Kia K4 GT-Line S 179 HP | Fair price

2026 GT-Line S 1.6T-GDi 180

2026
5,216 miles
Trim level: GT-Line S
1.6L Petrol
Hatchback
Automatic
179 HP (131 kW)
CO2 emissions: 152 g CO2/km comb.
6.6 mpg
Details

Fair price

£27,581

£28,267

SS7 3NL Rayleigh, Essex

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Availability verified

-8%

1 / 4

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

2026 GT-Line S 1.0T-GDi 115 48V

2026
2,117 miles
Trim level: GT-Line S
1.2L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
49 mpg
Details

Fair price

£24,239

£26,497

NG1 3FS Nottingham, Nottinghamshire

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-7%

1 / 4

Used (2026) Kia K4 GT-Line S 180 HP | Fair price

2026 GT-Line S 1.6T-GDi 180

2026
3,941 miles
Trim level: GT-Line S
1.6L Petrol
Hatchback
Automatic
180 HP (132 kW)
CO2 emissions: 152 g CO2/km comb.
6.6 mpg
Details

Fair price

£26,699

£28,888

S81 7AE Nottinghamshire, Nottinghamshire

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1 / 4

Used (2026) Kia K4 GT-Line S 114 HP | Fair price

2026 GT-Line S 1.0T-GDi 115 48V

2026
2,547 miles
Trim level: GT-Line S
1.2L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 132 g CO2/km comb.
5.8 mpg
Details

Fair price

£26,471

£26,708

CM14 4NS Essex, Essex

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Availability verified

-14%

1 / 4

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0T-GDi 115 48V GT-Line S 5dr

2026
9,488 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
5.6 mpg
Details

Fair price

£23,995

£27,995

RG2 0ST Berkshire, Berkshire

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Availability verified

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Carwow

GT-Line S

(2026) Kia K4 GT-Line S 114 HP

£26,471

Fair price

Estimated price £25,269

CM14 4NS Essex, Essex

132 g CO2/km comb. - 114 HP (83 kW) - 5.8 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 115 HP

£25,390

Fair price

Estimated price £25,230

SO30 2WA Hedge End, Hampshire

132 g CO2/km comb. - 115 HP (84 kW) - 5.6 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 115 HP

£24,295

Fair price

You save £405

OX26 6PZ Oxfordshire, Oxfordshire

132 g CO2/km comb. - 115 HP (84 kW) - 5.6 Mpg

Carwow

GT-Line S

(2026) Kia K4 GT-Line S 114 HP

£24,995

Fair price

You save £505

RG2 0ST Berkshire, Berkshire

132 g CO2/km comb. - 114 HP (83 kW) - 5.8 Mpg

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1 / 4

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

Hatchback 1.0T-GDi 115 48V GT-Line

2026
6,312 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
5.6 mpg
Details

Fair price

£25,390

£27,991

SO30 2WA Hedge End, Hampshire

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-8%

1 / 4

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

GT-Line S

2026
11,080 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
5.6 mpg
Details

Fair price

£24,295

£26,695

OX26 6PZ Oxfordshire, Oxfordshire

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-12%

1 / 4

Used (2026) Kia K4 GT-Line S 179 HP | Fair price

1.6 T-GDi GT-Line S DCT Euro 6

2026
7,125 miles
Trim level: GT-Line S
1.6L Petrol
Hatchback
Automatic
179 HP (131 kW)
CO2 emissions: 152 g CO2/km comb.
6.8 mpg
Details

Fair price

£26,395

£29,995

RG14 7HT Berkshire, Berkshire

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1 / 1

New (2026) Kia K4 GT-Line S 114 HP | Fair price

2026 GT-Line S 1.0T-GDi 115 48V

2026
800 miles
Trim level: GT-Line S
1.2L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 132 g CO2/km comb.
5.8 mpg
Details

Fair price

£24,995

RG2 0ST Berkshire, Berkshire

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-3%

1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0 T-GDi MHEV GT-Line S DCT Euro

2026
2,121 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£25,772

£26,799

Dealer

London, London

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-2%

1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0T-GDi 115 48V GT-Line S 5dr DCT

2026
1,308 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£24,836

£25,460

Dealer

London, London

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-11%

1 / 1

Used (2026) Kia K4 GT-Line S 113 HP | Fair price

1.0T-GDi 115 48V GT-Line S 5dr

2026
6,854 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
113 HP (83 kW)
CO2 emissions: 132 g CO2/km comb.
5.6 mpg
Details

Fair price

£24,055

£27,100

Dealer

BS34 5BW Patchway, Gloucestershire

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-11%

1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0 T Gdi Mhev Gt Line S Hatchback

2026
2,500 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
5.6 mpg
Details

Fair price

£24,667

£27,990

Dealer

PE30 4NB Norfolk, Norfolk

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-11%

1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0 T Gdi Mhev Gt Line S Hatchback

2026
3,544 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
48.7 mpg
Details

Fair price

£26,499

£29,999

Dealer

IP24 1HT Norfolk, Norfolk

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-10%

1 / 4

Used (2026) Kia K4 GT-Line S | Fair price

K4 Hatchback 1.6T-GDi 180 GT-Line

2026
2,136 miles
Trim level: GT-Line S
1.6L Petrol
Hatchback
Automatic
Details

Fair price

£27,618

£30,750

Exchange and Mart

Warwickshire, Warwickshire

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Carwow

GT-Line S

(2026) Kia K4 GT-Line S 180 HP

£26,699

Fair price

You save £1,101

S81 7AE Nottinghamshire, Nottinghamshire

152 g CO2/km comb. - 180 HP (132 kW) - 6.6 Mpg

Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£22,525

Good price

You save £1,375

CM14 4NS Essex, Essex

148 g CO2/km comb. - 150 HP (110 kW) - 6.4 Mpg

Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£23,490

Fair price

You save £110

B73 6SP Birmingham, West Midlands

148 g CO2/km comb. - 150 HP (110 kW) - 6.4 Mpg

Carwow Leasing

GT-Line

(2026) Kia K4 GT-Line 114 HP

£23,999

Good price

You save £1,501

S601TU

130 g CO2/km comb. - 114 HP (83 kW) - 5.7 Mpg

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1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0 T-GDi MHEV GT-Line S Hatchback

2026
2,500 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£24,995

£27,895

Dealer

DY10 1JR Kidderminster, Worcestershire

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New

1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0T-GDi 115 48V GT-Line S 5dr

2026
4,403 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£25,995

Dealer

London, London

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New

1 / 4

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0T-GDi 115 48V GT-Line S 5dr

2026
1,696 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 132 g CO2/km comb.
5.6 mpg
Details

Fair price

£24,998

Dealer

PA1 2BH Renfrewshire, Renfrewshire

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-10%

1 / 4

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0 T-GDi MHEV GT-Line S DCT Euro

2026
5,824 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£24,997

£27,984

Exchange and Mart

West Yorkshire, West Yorkshire

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-2%

1 / 1

Used (2026) Kia K4 GT-Line S 115 HP | Fair price

1.0T-GDi 115 48V GT-Line S 5dr DCT

2026
9,381 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£24,278

£24,890

Dealer

London, London

View the car

Featured deals

Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£23,495

Fair price

You save £605

S60 1TU Parkgate, South Yorkshire

148 g CO2/km comb. - 150 HP (110 kW) - 6.4 Mpg

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£23,972

Good price

You save £1,328

B93 8NJ Dorridge, West Midlands

130 g CO2/km comb. - 114 HP (83 kW) - 5.7 Mpg

Carwow Leasing

New Kia K4 114 HP (83 kW) 2026 Hatchback

(2026) Kia K4 114 HP

£22,995

Fair price

Estimated price £21,891

HD16AP

129 g CO2/km comb. - 114 HP (83 kW) - 5.7 Mpg

Carwow

GT-Line

(2026) Kia K4 GT-Line 115 HP

£23,495

Good price

You save £2,305

RG2 0ST Berkshire, Berkshire

130 g CO2/km comb. - 115 HP (84 kW) - 5.6 Mpg

Showing 1 - 25 of 54 results

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