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Kia K4 (GT-Line) • 56 cars with analysis

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GT-Line

(2026) Kia K4 GT-Line 114 HP

£25,500

Good price

You save £1,700

CV6 4DG West Midlands, West Midlands

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

Carwow

GT-Line

(2025) Kia K4 GT-Line 150 HP

£22,995

Good price

You save £1,605

Lonehea Edinburgh, Edinburgh

148 g CO2/km comb. - 150 HP (110 kW) - 44.0 Mpg

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£25,500

Fair price

Estimated price £25,245

CV64DG

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

Carwow Leasing

GT-Line

(2026) Kia K4 GT-Line 114 HP

£25,937

Good price

You save £1,563

HD16AP

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

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-6%

1 / 4

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

2026 GT-Line 1.0T-GDi 115 48V

2026
1,200 miles
Trim level: GT-Line
1.2L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
50 mpg
Details

Fair price

£24,388

£25,990

Lonehea Edinburgh, Edinburgh

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-4%

1 / 4

Used (2026) Kia K4 GT-Line 150 HP | Fair price

1.6T-GDi 150 GT-Line 5dr DCT

2026
5,429 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 148 g CO2/km comb.
6.4 mpg
Details

Fair price

£24,829

£25,928

CM14 4NS Essex, Essex

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-4%

1 / 4

Used (2026) Kia K4 GT-Line 150 HP | Fair price

2026 GT-Line 1.6T-GDi 150 5dr

2026
7,299 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 148 g CO2/km comb.
6.4 mpg
Details

Fair price

£23,395

£24,465

PR25PD Preston, Lancashire

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-12%

1 / 4

New (2026) Kia K4 GT-Line 150 HP | Fair price

- 1.6T-GDi 150 GT-Line 5dr DCT

2026
117 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 148 g CO2/km comb.
6.4 mpg
Details

Fair price

£25,404

£29,044

E12 5AW Greater London, London

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Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£25,801

Fair price

Estimated price £24,903

RM6 6EE Greater London, London

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

Carwow

GT-Line

(2026) Kia K4 GT-Line 115 HP

£24,171

Good price

You save £2,329

BD1 4AJ West Yorkshire, West Yorkshire

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

Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£22,995

Good price

You save £1,605

EH288TH Newbridge, Edinburgh

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

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£24,069

Fair price

You save £931

Lonehea Edinburgh, Edinburgh

130 g CO2/km comb. - 114 HP (83 kW) - 50.0 Mpg

-3%

1 / 4

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

2026 GT-Line 1.0T-GDi 115 48V

2026
1,975 miles
Trim level: GT-Line
1.2L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
50 mpg
Details

Fair price

£23,997

£24,980

Canal West Yorkshire, West Yorkshire

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-6%

1 / 4

Used (2026) Kia K4 GT-Line 150 HP | Fair price

2026 GT-Line 1.6T-GDi 150 5dr

2026
3,593 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 148 g CO2/km comb.
6.4 mpg
Details

Fair price

£24,311

£25,888

S81 7AE Nottinghamshire, Nottinghamshire

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-3%

1 / 4

Used (2026) Kia K4 GT-Line 150 HP | Fair price

2026 GT-Line 1.6T-GDi 150 DCT

2026
2,348 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 148 g CO2/km comb.
6.4 mpg
Details

Fair price

£23,999

£24,799

S60 1TU Parkgate, South Yorkshire

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1 / 4

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

2026 GT-Line 1.0T-GDi 115 48V 5dr

2026
9 miles
Trim level: GT-Line
1.2L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
5.7 mpg
Details

Fair price

£25,500

CV64DG

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-11%

1 / 4

Used (2026) Kia K4 GT-Line 150 HP | Fair price

- 1.6T-GDi 150 GT-Line 5dr DCT

2026
1,851 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 148 g CO2/km comb.
6.4 mpg
Details

Fair price

£25,801

£29,060

RM6 6EE Greater London, London

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-6%

1 / 4

New (2025) Kia K4 GT-Line 114 HP | Fair price

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

2025
0 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
5.7 mpg
Details

Fair price

£28,795

£30,665

CB225DG

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Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£23,989

Fair price

You save £1,211

DH7 8AB County Durham, Durham

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

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£24,388

Fair price

You save £812

Lonehea Edinburgh, Edinburgh

130 g CO2/km comb. - 114 HP (83 kW) - 50.0 Mpg

Carwow Leasing

GT-Line

(2025) Kia K4 GT-Line 114 HP

£28,795

Fair price

Estimated price £27,606

CB225DG

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

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£23,997

Super price

You save £3,003

BD1 4AJ West Yorkshire, West Yorkshire

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

New

1 / 4

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

2026 GT-Line 1.0T-GDi 115 48V

2026
12 miles
Trim level: GT-Line
1.2L Petrol
Hatchback
Automatic
114 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
5.7 mpg
Details

Fair price

£23,989

DH7 8AB County Durham, Durham

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-4%

1 / 1

Used (2026) Kia K4 GT-Line 147 HP | Fair price

1.6T-GDi 150 GT-Line 5dr DCT

2026
2,487 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
147 HP (108 kW)
CO2 emissions: 148 g CO2/km comb.
43.5 mpg
Details

Fair price

£24,602

£25,757

Dealer

CF11 8TT Cardiff, South Glamorgan

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-6%

1 / 3

Used (2026) Kia K4 GT-Line 147 HP | Fair price

1.6T-GDi 150 GT-Line 5dr DCT

2026
5,419 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
147 HP (108 kW)
CO2 emissions: 148 g CO2/km comb.
43.5 mpg
Details

Fair price

£24,995

£26,595

Motors.co.uk

CA3 0ET Cumberland, Cumbria

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-7%

1 / 3

Used (2026) Kia K4 GT-Line 147 HP | Fair price

Hatchback 1.6T-GDi 150 GT-Line 5dr

2026
5,400 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
147 HP (108 kW)
CO2 emissions: 148 g CO2/km comb.
43.5 mpg
Details

Fair price

£24,495

£26,495

Parkers.co.uk

CB22 5DG Stapleford, Cambridgeshire

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-3%

1 / 4

New (2026) Kia K4 GT-Line 147 HP | Fair price

1.6T-GDi 150 GT-Line 5dr DCT

2026
1,300 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
147 HP (108 kW)
CO2 emissions: 148 g CO2/km comb.
43.5 mpg
Details

Fair price

£24,998

£25,998

Dealer

L8 6PZ Merseyside, Merseyside

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1 / 4

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

Hatchback 1.0T-GDi 115 48V GT-Line

2026
27 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
113 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
49.6 mpg
Details

Fair price

£26,995

Motors.co.uk

BT66 7BG Lurgan

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Used (2026) Kia K4 GT-Line 147 HP | Fair price

16T-GDi 150 GT-Line 5dr DCT

2026
3,609 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
147 HP (108 kW)
CO2 emissions: 148 g CO2/km comb.
43.5 mpg
Details

Fair price

£25,497

Motors.co.uk

KY12 8AN Fife, Fife

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-5%

1 / 1

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

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

2026
2,000 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 130 g CO2/km comb.
5.6 mpg
Details

Fair price

£26,101

£27,480

Parkers.co.uk

LE4 7SJ Leicester, Leicestershire

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-2%

1 / 4

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

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

2026
5,000 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 130 g CO2/km comb.
5.6 mpg
Details

Fair price

£26,199

£26,973

Motors.co.uk

LE10 0NF Leicestershire, Leicestershire

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1 / 1

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

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

2026
18 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
113 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
5.6 mpg
Details

Fair price

£26,000

Dealer

BS2 Bristol City, Bristol

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Verified Dealers

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£23,997

Fair price

You save £1,103

Canal West Yorkshire, West Yorkshire

130 g CO2/km comb. - 114 HP (83 kW) - 50.0 Mpg

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£21,990

Super price

You save £3,510

S711HH

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

Carwow Leasing

GT-Line

(2026) Kia K4 GT-Line 114 HP

£24,845

Fair price

You save £355

S601TU

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

Carwow

GT-Line

(2026) Kia K4 GT-Line 114 HP

£24,069

Super price

You save £2,831

EH288TH Newbridge, Edinburgh

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

-13%

1 / 1

New (2026) Kia K4 GT-Line 147 HP | Fair price

1.6T-GDi 150 GT-Line 5dr DCT

2026
10 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
147 HP (108 kW)
CO2 emissions: 148 g CO2/km comb.
5.8 mpg
Details

Fair price

£24,850

£28,850

Dealer

NP19 4QR Newport, Gwent

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-3%

1 / 4

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

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

2026
1 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
113 HP (83 kW)
CO2 emissions: 130 g CO2/km comb.
49.6 mpg
Details

Fair price

£25,998

£26,998

Dealer

KY1 3NE Fife, Fife

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-11%

1 / 4

Used (2026) Kia K4 GT-Line 150 HP | Fair price

- 1.6T-GDi 150 GT-Line 5dr DCT

2026
4,250 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 148 g CO2/km comb.
6.4 mpg
Details

Fair price

£24,650

£27,850

Exchange and Mart

Essex, Essex

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-3%

1 / 4

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

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

2026
30 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
CO2 emissions: 130 g CO2/km comb.
5.6 mpg
Details

Fair price

£25,497

£26,497

Motors.co.uk

KY12 8AN Fife, Fife

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-1%

1 / 3

Used (2026) Kia K4 GT-Line 147 HP | Fair price

1.6 T Gdi Gt Line Hatchback 5dr

2026
5,000 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
147 HP (108 kW)
CO2 emissions: 148 g CO2/km comb.
43.5 mpg
Details

Fair price

£25,195

£25,495

Motors.co.uk

CB4 1SR Cambridgeshire, Cambridgeshire

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Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£23,999

Fair price

You save £901

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 177 HP

£25,553

Super price

You save £3,147

DN31 1SF North East Lincolnshire, Lincolnshire

148 g CO2/km comb. - 177 HP (130 kW) - 6.4 Mpg

Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£25,404

Fair price

Estimated price £25,039

E12 5AW Greater London, London

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

Carwow

GT-Line

(2026) Kia K4 GT-Line 150 HP

£24,829

Fair price

Estimated price £24,623

CM14 4NS Essex, Essex

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

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