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2025 BMW 420 • Compare 148 used cars with valuation

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Carwow Leasing

2025

(2025) BMW 420 M Sport 184 HP

£48,357

Fair price

You save £1,043

OX28JP Oxfordshire, Oxfordshire

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£47,500

Good price

You save £2,400

S92RQ

144 g CO2/km comb. - 184 HP (135 kW) - 6.3 Mpg

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£45,895

Good price

You save £3,505

HG3 1LG Pannal, North Yorkshire

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow Leasing

2025

(2025) BMW 420 M Sport 184 HP

£46,336

Good price

You save £3,064

RH10 1TN West Sussex, West Sussex

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

New

1 / 3

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
2,116 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£38,999

Bmw.co.uk

SK9 3PB Handforth, Cheshire

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-2%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
7,370 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 160 g CO2/km comb.
mpg: 40.4
Details

Fair price

£38,995

£39,995

Bmw.co.uk

BT63 Armagh City, Banbridge And Craigavon

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-4%

1 / 3

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
8,389 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 146 g CO2/km comb.
mpg: 44.1
Details

Fair price

£38,499

£40,499

Bmw.co.uk

CH1 4LS Chester, Cheshire

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-3%

1 / 4

Used (2025) BMW 420 M Sport 184 HP | Fair price

4 Series i M Sport 5dr Step

2025
9,439 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
mpg: 42.2
Details

Fair price

£37,498

£38,998

Dealer

IV1 1RY Highland Council, Inverness-Shire

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Carwow

2026

(2026) BMW 420 M Sport 184 HP

£37,890

Good price

You save £2,810

CT27PX

144 g CO2/km comb. - 184 HP (135 kW) - 6.3 Mpg

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£37,359

Good price

You save £1,841

TS18 3RB, Durham

153 g CO2/km comb. - 184 HP (135 kW) - 42.0 Mpg

Carwow Leasing

2025

(2025) BMW 420 M Sport 184 HP

£45,564

Super price

You save £3,836

RH10 1TN West Sussex, West Sussex

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£37,490

Good price

You save £3,110

SO533YU

154 g CO2/km comb. - 184 HP (135 kW) - 6.8 Mpg

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
4,893 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 147 g CO2/km comb.
mpg: 44.1
Details

Fair price

£38,495

£36,990

Buyacar

Delivered to you

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1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
6,141 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 160 g CO2/km comb.
mpg: 40.4
Details

Fair price

£38,299

£38,499

Bmw.co.uk

SK9 3PB Handforth, Cheshire

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-2%

1 / 4

Used (2025) BMW 420 M Sport | Fair price

4 Series i M Sport Gran Coupe

2025
7,281 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Fair price

£38,500

£39,450

Exchange and Mart

West Yorkshire, West Yorkshire

View the car

-5%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
4,617 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£37,995

£39,995

Bmw.co.uk

ML3 0AY Glasgow, Lanarkshire

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-20%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
2,500 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 145 g CO2/km comb.
mpg: 44.1
Details

Fair price

£39,950

£49,999

Bmw.co.uk

DE21 Derby, Derbyshire

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-5%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
6,620 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£37,890

£39,990

Bmw.co.uk

CT2 7PX Kent, Kent

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Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£46,588

Good price

You save £2,812

MK150DQ Milton Keynes, Buckinghamshire

155 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£35,890

Super price

You save £3,410

CT2 7PX Kent, Kent

146 g CO2/km comb. - 184 HP (135 kW) - 44.1 Mpg

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£48,141

Fair price

You save £1,259

MK150DQ Milton Keynes, Buckinghamshire

155 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2023

(2023) BMW 420 M Sport 192 HP

£32,646

Good price

You save £2,454

NE36 0BQ West Boldon, Tyne And Wear

154 g CO2/km comb. - 192 HP (141 kW) - 40.4 Mpg

-7%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
7,211 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 146 g CO2/km comb.
mpg: 44.1
Details

Fair price

£38,998

£41,999

Bmw.co.uk

EH28 8TH Edinburgh, Edinburgh

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-1%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
7,704 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£39,000

£39,500

Bmw.co.uk

B78 3HG Staffordshire, Staffordshire

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-6%

1 / 4

Used (2025) BMW 420 M Sport 184 HP | Fair price

4 Series i M Sport Convertible 2.0

Apr 2025
5,281 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
184 HP (135 kW)
CO2 emissions: 169 g CO2/km comb.
mpg: 38.2
Details

Fair price

£42,995

£45,995

Buyacar

Delivered to you

View the car

1 / 3

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
10,709 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 146 g CO2/km comb.
mpg: 44.1
Details

Fair price

£36,699

£36,999

Bmw.co.uk

LL31 9PL Conwy, Clwyd

View the car

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
4,379 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 148 g CO2/km comb.
mpg: 43.5
Details

Fair price

£41,000

Bmw.co.uk

LE19 Leicestershire, Leicestershire

View the car

-1%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
7,082 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£37,500

£38,000

Bmw.co.uk

SA5 8LW Cwmbwrla, West Glamorgan

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-7%

1 / 3

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport 5dr

2025
4,152 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
Details

Fair price

£39,000

£42,000

Buyacar

Delivered to you

View the car

-1%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
6,865 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 160 g CO2/km comb.
mpg: 40.4
Details

Fair price

£37,990

£38,490

Bmw.co.uk

TN24 0GA Kent, Kent

View the car

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
11,068 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 160 g CO2/km comb.
mpg: 40.4
Details

Fair price

£39,995

Motors.co.uk

BT12 6QU Belfast

View the car

-2%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
5,965 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 147 g CO2/km comb.
mpg: 43.5
Details

Fair price

£38,950

£39,750

Bmw.co.uk

LE19 Leicestershire, Leicestershire

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Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£44,277

Super price

You save £5,123

W1K 7TT Greater London, London

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£38,490

Fair price

You save £810

SO53 3YU Cross Rise, Hampshire

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£37,483

Super price

You save £3,717

PO35FF

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£47,376

Good price

You save £2,024

DN2 4SR South Yorkshire, South Yorkshire

155 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

-1%

1 / 4

Used (2025) BMW 420 M Sport | Fair price

4 Series i M Sport Gran Coupe M

2025
9,432 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Fair price

£37,450

£38,000

Exchange and Mart

West Yorkshire, West Yorkshire

View the car

-5%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
11,605 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£36,950

£38,899

Bmw.co.uk

LE19 Leicestershire, Leicestershire

View the car

-6%

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
11,751 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£36,990

£39,395

Bmw.co.uk

SK4 2JZ Greater Manchester, Manchester

View the car

1 / 4

Used (2025) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2025
6,047 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 159 g CO2/km comb.
mpg: 40.4
Details

Fair price

£39,500

Bmw.co.uk

LE19 Leicestershire, Leicestershire

View the car

-8%

1 / 4

Used (2025) BMW 420 M Sport | Fair price

4 Series i M Sport Gran Coupe

2025
5,000 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Fair price

£38,500

£41,950

Exchange and Mart

West Yorkshire, West Yorkshire

View the car

Featured deals

Verified Dealers

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£36,990

Fair price

Estimated price £36,896

SO53 3YU Cross Rise, Hampshire

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£45,950

Good price

You save £3,450

SY14AQ

144 g CO2/km comb. - 184 HP (135 kW) - 6.3 Mpg

Carwow Leasing

2025

(2025) BMW 420 M Sport 184 HP

£49,150

Fair price

You save £250

RH10 1TN West Sussex, West Sussex

153 g CO2/km comb. - 184 HP (135 kW) - 6.6 Mpg

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£29,300

Super price

You save £5,200

CM1 3BH Essex, Essex

154 g CO2/km comb. - 184 HP (135 kW) - 6.8 Mpg

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