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Kia K4 Valuation: 140 used car listings analysed

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Used Kia K4 GT-Line S 114 HP (83 kW) 2026 Hatchback

(2026) Kia K4 GT-Line S 114 HP

£24,990

Fair price

You save £10

BB115EX

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

Carwow

Used Kia K4 GT-Line S 115 HP (84 kW) 2026 Blue Hatchback

(2026) Kia K4 GT-Line S 115 HP

£24,566

Fair price

You save £534

S81 7AE Nottinghamshire, Nottinghamshire

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

Carwow

Used Kia K4 GT-Line S 115 HP (84 kW) 2026 White Hatchback

(2026) Kia K4 GT-Line S 115 HP

£24,395

Fair price

You save £305

OX26 6PZ Oxfordshire, Oxfordshire

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

Carwow

New Kia K4 GT-Line 114 HP (83 kW) 2026 White Hatchback

(2026) Kia K4 GT-Line 114 HP

£24,999

Fair price

Estimated price £23,863

CV6 4DG West Midlands, West Midlands

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

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

2026 GT-Line 1.0T-GDi 115 48V

2026
92 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

£24,999

£25,500

CV6 4DG West Midlands, West Midlands

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-7%

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

K4 Hatchback 1.6T-GDi 150 GT-Line

2026
3,152 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

£23,276

£25,044

SS7 3NL Rayleigh, Essex

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-6%

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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

£26,384

£28,267

SS7 3NL Rayleigh, Essex

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-17%

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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

£24,640

£29,988

S71 1EZ South Yorkshire, South Yorkshire

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Used Kia K4 GT-Line 150 HP (110 kW) 2026 Blue Hatchback

(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

Used Kia K4 GT-Line S 179 HP (131 kW) 2026 Pearl snow white Hatchback

(2026) Kia K4 GT-Line S 179 HP

£26,384

Fair price

You save £1,316

SS7 3NL Rayleigh, Essex

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

Carwow

Used Kia K4 GT-Line S 179 HP (131 kW) 2026 Blue Hatchback

(2026) Kia K4 GT-Line S 179 HP

£28,995

Fair price

Estimated price £27,684

OX26 6PZ Oxfordshire, Oxfordshire

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

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1 / 4

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

2026 GT-Line S 1.6T-GDi 180

2026
5,025 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

£28,995

£29,495

OX26 6PZ Oxfordshire, Oxfordshire

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1 / 4

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

2026 GT-Line 1.0T-GDi 115 48V

2026
576 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

£22,990

£22,995

HD1 6AP West Yorkshire, West Yorkshire

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-5%

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

2026 GT-Line 1.6T-GDi 150 DCT

2026
3,750 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

£24,799

S60 1TU Parkgate, South Yorkshire

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-8%

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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

£24,395

£26,695

OX26 6PZ Oxfordshire, Oxfordshire

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-9%

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

2026 GT-Line 1.6T-GDi 150 GT-Line

2026
7,487 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

£23,490

£25,995

B73 6SP Birmingham, West Midlands

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1 / 4

New (2026) Kia K4 114 HP | Fair price

- 1.0T-GDi 115 48V Pure 5dr

2026
8 miles
1.2L Petrol
Hatchback
Manual
114 HP (83 kW)
CO2 emissions: 129 g CO2/km comb.
5.7 mpg
Details

Fair price

£22,995

HD16AP

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Carwow

Used Kia K4 GT-Line 114 HP (83 kW) 2026 Hatchback

(2026) Kia K4 GT-Line 114 HP

£23,108

Good price

You save £2,192

B93 8NJ Dorridge, West Midlands

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

Carwow

New Kia K4 GT-Line S 114 HP (83 kW) 2026 Hatchback

(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

Carwow

Used Kia K4 GT-Line 150 HP (110 kW) 2026 Black Hatchback

(2026) Kia K4 GT-Line 150 HP

£23,395

Fair price

You save £605

S60 1TU Parkgate, South Yorkshire

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

Carwow

Used Kia K4 GT-Line 115 HP (84 kW) 2026 Gold Hatchback

(2026) Kia K4 GT-Line 115 HP

£22,537

Super price

You save £3,263

EH11 4AS Sighthill, Edinburgh

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

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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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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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1 / 4

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

2026 GT-Line 1.6T-GDi 150 GT-Line

2026
3,610 miles
Trim level: GT-Line
1.6L Petrol
Hatchback
Automatic
150 HP (110 kW)
CO2 emissions: 130 g CO2/km comb.
6.4 mpg
Details

Fair price

£22,999

S402WG Derbyshire, Derbyshire

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-12%

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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

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

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

2026
5,000 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

£24,990

BB115EX

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-3%

1 / 4

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

K4 Hatchback 1.0T-GDi 115 48V

2026
5,010 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£25,559

£26,380

Exchange and Mart

Buckinghamshire, Buckinghamshire

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-2%

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

K4 Hatchback 1.0T-GDi 115 48V

2026
6,106 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£25,359

£25,980

Exchange and Mart

Buckinghamshire, Buckinghamshire

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

K4 Hatchback 1.0T-GDi 115 48V

2026
2,547 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£25,492

£25,807

Exchange and Mart

Essex, Essex

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

K4 Hatchback 1.6T-GDi 180 GT-Line

2026
7,425 miles
Trim level: GT-Line S
1.6L Petrol
Hatchback
Automatic
Details

Fair price

£25,980

£29,048

Exchange and Mart

Buckinghamshire, Buckinghamshire

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

1.6T-GDi 150 GT-Line 5dr DCT

2026
1,709 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

£24,250

£24,995

Dealer

CA3 0ET Cumberland, Cumbria

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New Kia K4 GT-Line 115 HP (84 kW) 2026 Black Hatchback

(2026) Kia K4 GT-Line 115 HP

£23,180

Super price

You save £2,620

BD1 4AJ West Yorkshire, West Yorkshire

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

Carwow

Used Kia K4 GT-Line 150 HP (110 kW) 2026 Premium paint sparkling yellow Hatchback

(2026) Kia K4 GT-Line 150 HP

£23,276

Fair price

You save £824

SS7 3NL Rayleigh, Essex

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

Carwow

Used Kia K4 GT-Line S 115 HP (84 kW) 2026 Black Hatchback

(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

Used Kia K4 GT-Line S 179 HP (131 kW) 2026 Grey Hatchback

(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

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1 / 1

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

Hatchback 1.6T-GDi 150 GT-Line 5dr

2026
5,036 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

£23,600

£24,995

Dealer

CA3 0ET Cumberland, Cumbria

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

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

2026
6,432 miles
Trim level: GT-Line S
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£23,900

£24,660

Dealer

London, London

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

1.0 T-GDi MHEV GT-Line DCT Euro 6

2026
6,300 miles
Trim level: GT-Line
1.0L Petrol
Hatchback
Automatic
115 HP (84 kW)
5.6 mpg
Details

Fair price

£24,999

£25,799

Dealer

London, London

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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

£23,656

£24,890

Dealer

London, London

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-4%

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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

£25,583

£26,799

Dealer

London, London

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Carwow Leasing

New Kia K4 GT-Line 114 HP (83 kW) 2026 Hatchback

(2026) Kia K4 GT-Line 114 HP

£24,060

Good price

You save £1,540

SS7 3NL Rayleigh, Essex

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

Carwow

Used Kia K4 GT-Line S 114 HP (83 kW) 2026 White Hatchback

(2026) Kia K4 GT-Line S 114 HP

£24,640

Fair price

You save £760

S71 1EZ South Yorkshire, South Yorkshire

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

Carwow

Used Kia K4 GT-Line S 180 HP (132 kW) 2026 White Hatchback

(2026) Kia K4 GT-Line S 180 HP

£25,999

Good price

You save £1,801

S81 7AE Nottinghamshire, Nottinghamshire

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

Carwow Leasing

(2026) Kia K4 GT-Line 114 HP

£23,890

Good price

You save £1,710

S601TU

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

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