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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

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

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

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

-9%

1 / 3

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

4 Series i M Sport Coupe 2.0

2025
4,188 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

Good price

£35,685

£39,499

Bmw.co.uk

WA2 8HY Warrington, Cheshire

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1 / 4

Used (2025) BMW 420 M Sport | Good price

4 Series i M Sport 5dr Step

2025
6,865 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Good price

£36,258

Motors.co.uk

EN1 1SW Enfield, London

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-11%

1 / 4

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

4 Series i M Sport Coupe 2.0

2025
7,070 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

Good price

£36,399

£40,990

Bmw.co.uk

PR8 5JF Scarisbrick, Lancashire

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-7%

1 / 4

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

4 Series i M Sport Coupe 2.0

2025
7,058 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

Super price

£34,995

£37,985

Bmw.co.uk

OL11 2PX Greater Manchester, Manchester

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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

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£45,895

Good price

You save £3,505

S41 9BU Derbyshire, Derbyshire

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

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£46,588

Good price

You save £2,812

S41 9BU Derbyshire, Derbyshire

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

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

-8%

1 / 4

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

4 Series i M Sport 5dr Step

2025
4,931 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

Good price

£36,398

£39,898

Dealer

KA12 8BZ North Ayrshire Council, Ayrshire And Arran

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-13%

1 / 4

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

4 Series i M Sport Coupe 2.0

2025
1,512 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

Good price

£36,450

£41,950

Bmw.co.uk

GL51 6UP The Reddings, Gloucestershire

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-7%

1 / 4

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

4 Series Gran Coupe i M Sport 5dr

Oct 2025
6,785 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
Details

Super price

£36,990

£39,995

Honestjohn

NR5 0JH Norfolk, Norfolk

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-8%

1 / 4

Used (2025) BMW 420 M Sport 180 HP | Good price

4 Series Gran Coupe i M Sport 5dr

2025
4,373 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
180 HP (132 kW)
Details

Good price

£38,444

£41,999

Honestjohn

WC1E 7DP Greater London, London

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-7%

1 / 4

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

4 Series i M Sport Coupe 2.0

2025
8,515 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

Super price

£34,950

£37,950

Bmw.co.uk

NN1 West Northamptonshire, Northamptonshire

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-1%

1 / 4

New (2025) BMW 420 M Sport 184 HP | Good price

4 Series i M Sport 5dr Step

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

Good price

£48,998

£49,698

Dealer

IV1 1RY Highland Council, Inverness-Shire

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Verified Dealers

Carwow Leasing

2025

(2025) BMW 420 M Sport 184 HP

£46,286

Good price

You save £3,114

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

£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

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

£37,983

Good price

You save £3,217

PO35FF

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

1 / 4

New (2025) BMW 420 M Sport 184 HP | Good price

4 Series i M Sport 5dr Step Auto

2025
10 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
CO2 emissions: 155 g CO2/km comb.
Details

Good price

£48,898

Dealer

IV1 1RY Highland Council, Inverness-Shire

View the car

1 / 4

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

4 Series i M Sport 5dr Step

2025
6,560 miles
Trim level: M Sport
2.0L Petrol
Estate
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
mpg: 42.2
Details

Good price

£37,898

Dealer

G52 4FA Renfrewshire, Renfrewshire

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New (2025) BMW 420 M Sport 180 HP | Super price

4 Series Gran Coupe i M Sport 5dr

2025
0 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
180 HP (132 kW)
Details

Super price

£48,240

£48,190

Buyacar

Delivered to you

View the car

New (2025) BMW 420 M Sport 180 HP | Good price

4 Series Gran Coupe i M Sport 5dr

2025
0 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
180 HP (132 kW)
Details

Good price

£48,614

£48,564

Buyacar

Delivered to you

View the car

New (2025) BMW 420 M Sport 180 HP | Super price

4 Series i M Sport 5dr Step

2025
0 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
180 HP (132 kW)
Details

Super price

£47,365

£47,315

Buyacar

Delivered to you

View the car

-16%

1 / 4

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

- 4 Series Gran Coupe i M Sport

2025
6,621 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
mpg: 6.6
Details

Fair price

£36,990

£44,490

SO53 3YU Cross Rise, Hampshire

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Availability verified

1 / 1

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

- 4 Series Gran Coupe i M Sport

2025
10 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
mpg: 6.6
Details

Fair price

£49,100

£48,946

RH10 1TN West Sussex, West Sussex

View the car

Availability verified

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

- 4 Series Gran Coupe i M Sport

2025
10 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
mpg: 6.6
Details

Fair price

£48,556

£48,394

RH10 1TN West Sussex, West Sussex

View the car

Availability verified

-7%

1 / 1

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

- 4 Series Gran Coupe i M Sport

2025
0 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
mpg: 6.6
Details

Fair price

£48,357

£52,265

OX28JP Oxfordshire, Oxfordshire

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Availability verified

-2%

1 / 4

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

4 Series i M Sport Coupe 2.0

2025
7,998 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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Carwow

2026

(2026) BMW 420 M Sport 184 HP

£34,599

Super price

You save £5,901

B65SU

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

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£47,511

Good price

You save £1,889

MK150DQ Milton Keynes, Buckinghamshire

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

Carwow Leasing

2026

(2026) BMW 420 M Sport 184 HP

£48,141

Fair price

You save £1,259

TN2 3UE Kent, Kent

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

Carwow Leasing

2025

(2025) BMW 420 M Sport 184 HP

£45,514

Super price

You save £3,886

RH10 1TN West Sussex, West Sussex

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

-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

View the car

-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

Motors.co.uk

CH1 4LS Chester, Cheshire

View the car

-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

View the car

1 / 4

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

4 Series i M Sport Coupe 2.0

2025
4,893 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

Honestjohn

WC1E 7DP Greater London, London

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
7,891 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

£37,950

£38,950

Bmw.co.uk

NN1 West Northamptonshire, Northamptonshire

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Featured deals

Verified Dealers

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

£52,846

Fair price

You save £1,554

W1K 7TT Greater London, London

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

Carwow

2023

(2023) BMW 420 M Sport 184 HP

£28,993

Fair price

Estimated price £28,719

SO53 3YU Cross Rise, Hampshire

151 g CO2/km comb. - 184 HP (135 kW) - 42.8 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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