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2026 BMW 420 • Compare 85 used cars with valuation

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2025

(2025) BMW 420 M Sport 184 HP

£36,090

Good price

You save £2,210

DE214RZ Derby, Derbyshire

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£38,565

Good price

You save £3,235

BA22 8RT Somerset, Somerset

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£38,890

Good price

You save £1,910

IP31 1SX Fornham Saint Martin, Suffolk

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

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£34,690

Good price

You save £2,210

DN2 4SR South Yorkshire, South Yorkshire

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

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1 / 4

Used (2026) BMW 420 M Sport 184 HP | Fair price

4 Series Convertible 2026 M Sport

2026
4,370 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
184 HP (135 kW)
CO2 emissions: 154 g CO2/km comb.
6.8 mpg
Details

Fair price

£44,995

£45,998

MK15 0DQ Milton Keynes, Buckinghamshire

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1 / 2

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Convertible 2.0

2026
5,140 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
181 HP (133 kW)
CO2 emissions: 157 g CO2/km comb.
40.9 mpg
Details

Fair price

£46,000

Bmw.co.uk

WR4 9FA Worcestershire, Worcestershire

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New

1 / 4

Used (2026) BMW 420 M Sport 184 HP | Fair price

4 Series i M Sport Pro 2dr Step

2026
2,517 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
CO2 emissions: 145 g CO2/km comb.
Details

Fair price

£41,498

Dealer

KY1 3NQ Fife, Fife

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New

1 / 4

Used (2026) BMW 420 M Sport 184 HP | Fair price

4 Series i M Sport 5dr Step

2026
2,631 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
CO2 emissions: 155 g CO2/km comb.
Details

Fair price

£39,498

Dealer

KY1 3NQ Fife, Fife

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Carwow

2026

(2026) BMW 420 M Sport 184 HP

£44,995

Fair price

Estimated price £43,599

MK15 0DQ Milton Keynes, Buckinghamshire

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£36,950

Good price

You save £2,650

HA36AG

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£35,999

Super price

You save £5,101

GU1 1RU Surrey, Surrey

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£39,995

Fair price

You save £505

MK15 0DQ Milton Keynes, Buckinghamshire

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

New

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

2026
8,319 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 156 g CO2/km comb.
40.9 mpg
Details

Fair price

£40,500

Bmw.co.uk

LU4 8QN Maidenhall, Bedfordshire

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New

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

2026
6,270 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 156 g CO2/km comb.
40.9 mpg
Details

Fair price

£41,750

Bmw.co.uk

PE4 5HW Peterborough, Cambridgeshire

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New

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

2026
8,026 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 161 g CO2/km comb.
39.8 mpg
Details

Fair price

£40,000

Bmw.co.uk

CV5 8NA West Midlands, West Midlands

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New

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe - 2026

Mar 2026
3,828 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 144 g CO2/km comb.
Details

Fair price

£40,990

Dealer

Bmw, Dumfriesshire

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New

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

2026
2,503 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 155 g CO2/km comb.
41.5 mpg
Details

Fair price

£41,995

Bmw.co.uk

ML3 0AY Glasgow, Lanarkshire

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New

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Convertible 2.0

2026
5,005 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
181 HP (133 kW)
CO2 emissions: 155 g CO2/km comb.
41.5 mpg
Details

Fair price

£44,995

Bmw.co.uk

MK15 0DQ Milton Keynes, Buckinghamshire

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Carwow

2025

(2025) BMW 420 M Sport 184 HP

£35,190

Good price

You save £1,710

S419ED Derbyshire, Derbyshire

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£40,950

Fair price

Estimated price £40,673

TN2 3UE Kent, Kent

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£37,850

Good price

You save £2,850

MK15 0DQ Milton Keynes, Buckinghamshire

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

Carwow

2026

(2026) BMW 420 M Sport 184 HP

£37,999

Good price

You save £2,401

GU1 1RU Surrey, Surrey

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

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Convertible 2.0

2026
8,000 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
181 HP (133 kW)
CO2 emissions: 157 g CO2/km comb.
40.9 mpg
Details

Fair price

£46,000

Bmw.co.uk

HP23 Hertfordshire, Hertfordshire

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1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

2026
6,569 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 156 g CO2/km comb.
40.9 mpg
Details

Fair price

£41,450

Bmw.co.uk

PE4 5HW Peterborough, Cambridgeshire

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1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

2026
3,123 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 157 g CO2/km comb.
40.9 mpg
Details

Fair price

£42,950

Bmw.co.uk

NE2 4LE Tyne And Wear, Tyne And Wear

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1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

Mar 2026
5,000 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 155 g CO2/km comb.
41.5 mpg
Details

Fair price

£41,475

Dealer

WD6 2BT Borehamwood, Hertfordshire

View the car

1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2026
4,000 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 146 g CO2/km comb.
44.1 mpg
Details

Fair price

£40,990

Bmw.co.uk

CT2 7PX Kent, Kent

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1 / 1

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series Gran Coupe i M Sport Gran

2026
9,189 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 155 g CO2/km comb.
41.5 mpg
Details

Fair price

£40,995

Bmw.co.uk

BT63 Armagh City, Banbridge And Craigavon

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1 / 4

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2026
5,855 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 147 g CO2/km comb.
43.5 mpg
Details

Fair price

£40,371

Bmw.co.uk

TS18 3RB Stockton-On-Tees, Durham

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1 / 4

New (2026) BMW 420 M Sport | Fair price

4 Series 2.0 i M Sport Pro Auto

2026
15 miles
Trim level: M Sport
2.0L Petrol
Automatic
Details

Fair price

£48,215

Dealer

PO3 5FF Portsmouth, Hampshire

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New

Used (2026) BMW 420 M Sport 184 HP | Fair price

4 Series i M Sport 5dr Step

2026
2,563 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
Details

Fair price

£39,898

Dealer

KA12 8BZ North Ayrshire Council, Ayrshire And Arran

View the car

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe 2.0

2026
5,265 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 147 g CO2/km comb.
43.5 mpg
Details

Fair price

£40,450

Bmw.co.uk

CO4 9TD Essex, Essex

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Carwow

2024

(2024) BMW 420 M Sport 184 HP

£30,199

Super price

You save £3,701

B69 2AS West Midlands, West Midlands

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

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£32,990

Super price

You save £4,010

DE214RZ Derby, Derbyshire

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

Carwow

2024

(2024) BMW 420 M Sport 184 HP

£30,000

Fair price

You save £1,400

LS12 6DL West Yorkshire, West Yorkshire

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

Carwow

2024

(2024) BMW 420 M Sport 184 HP

£30,799

Good price

You save £2,501

LS12 6DL West Yorkshire, West Yorkshire

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

Used (2026) BMW 420 M Sport 181 HP | Fair price

4 Series i M Sport Coupe - 2026

Jun 2026
5,265 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 147 g CO2/km comb.
Details

Fair price

£40,450

Dealer

Bmw, Dumfriesshire

View the car

1 / 4

New (2026) BMW 420 M Sport 184 HP | A bit pricey

4 Series Gran Coupe 2026 M sport i

2026
500 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 153 g CO2/km comb.
6.6 mpg
Details

A bit pricey

£39,599

LS12 6DL West Yorkshire, West Yorkshire

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Availability verified

New

1 / 4

Used (2026) BMW 420 M Sport 184 HP | A bit pricey

4 Series i M Sport 5dr Step

2026
2,587 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
Details

A bit pricey

£42,898

Dealer

G52 4FA Renfrewshire, Renfrewshire

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New

1 / 4

Used (2026) BMW 420 M Sport 184 HP | A bit pricey

4 Series i M Sport 5dr Step Auto

2026
2,513 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
Details

A bit pricey

£42,898

Dealer

G52 4FA Renfrewshire, Renfrewshire

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New

1 / 1

Used (2026) BMW 420 M Sport 184 HP | A bit pricey

4 Series i M Sport 5dr Step Auto

2026
2,577 miles
Trim level: M Sport
2.0L Petrol
Hatchback
Automatic
184 HP (135 kW)
Details

A bit pricey

£42,898

Dealer

G52 4FA Renfrewshire, Renfrewshire

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Featured deals

Carwow

2025

(2025) BMW 420 M Sport 184 HP

£33,899

Super price

You save £3,501

G32 9QA Glasgow City, Glasgow

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

Carwow

2024

(2024) BMW 420 M Sport 184 HP

£32,495

Fair price

You save £1,005

TN2 3UE Kent, Kent

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

Carwow

2024

(2024) BMW 420 M Sport 184 HP

£32,845

Good price

You save £1,755

RH10 1TN West Sussex, West Sussex

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

Carwow

2008

(2008) Mini Cooper Clubman 122 HP

£1,000

Super price

You save £1,200

TN15 6JD West Kingsdown, Kent

129 g CO2/km comb. - 122 HP (89 kW) - 51.0 Mpg

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