2020 BMW 420 • Compare 96 used cars with valuation

Market overview: April-2026 Price Analysis: A used BMW 420 from 2020 currently costs between £10,599 and £24,450. On average, the mileage for this year stands at 59,328 miles. The depreciation and price trend over the last 12 months is -£1,560.

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Carwow

2019

(2019) BMW 420 M Sport 190 HP

£15,440

Fair price

Estimated price £15,398

G3 6ED Glasgow City, Glasgow

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2019

(2019) BMW 420 M Sport 184 HP

£16,338

Good price

You save £1,262

RM13 8RH Greater London, London

170 g CO2/km comb. - 184 HP (135 kW) - 7.3 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£14,300

Good price

You save £1,400

LS270TS

156 g CO2/km comb. - 190 HP (139 kW) - 5.9 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£19,999

Fair price

You save £201

EH151BT

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

-2%

1 / 4

Used (2020) BMW 420 M Sport 184 HP | Super price

- 4 Series i xDrive M Sport 2dr

2020
35,850 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 179 g CO2/km comb.
mpg: 7.8
Details

Super price

£15,840

£16,295

W1H 7AB Greater London, London

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-3%

1 / 4

Used (2020) BMW 420 M Sport 184 HP | Good price

- 4 Series Convertible i M Sport

2020
64,804 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
184 HP (135 kW)
CO2 emissions: 182 g CO2/km comb.
mpg: 8
Details

Good price

£14,999

£15,499

WR37RL

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Availability verified

-2%

1 / 4

Used (2020) BMW 420 M Sport 190 HP | Good price

- 4 Series d [190] xDrive M Sport

2020
42,481 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 158 g CO2/km comb.
mpg: 6
Details

Good price

£17,149

£17,649

IP12DZ, Suffolk

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1 / 3

Used (2020) BMW 420 M Sport 184 HP | Good price

- 4 Series Convertible i M Sport

2020
30,717 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
184 HP (135 kW)
CO2 emissions: 182 g CO2/km comb.
mpg: 8
Details

Good price

£17,607

£17,758

E65LU

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Carwow

2021

(2021) BMW 420 M Sport 184 HP

£15,806

Good price

You save £1,394

E65LU

178 g CO2/km comb. - 184 HP (135 kW) - 7.8 Mpg

Carwow

2021

(2021) BMW 420 M Sport 184 HP

£13,995

Super price

You save £3,005

OL10 4HQ Greater Manchester, Manchester

169 g CO2/km comb. - 184 HP (135 kW) - 7.3 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£13,995

Fair price

You save £605

NE12 9SW Longbenton, Tyne And Wear

151 g CO2/km comb. - 190 HP (139 kW) - 5.8 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£16,270

Fair price

You save £730

W1H7AB

151 g CO2/km comb. - 190 HP (139 kW) - 5.8 Mpg

-5%

1 / 3

Used (2020) BMW 420 M Sport 190 HP | Good price

- 4 Series d [190] M Sport 2dr

2020
73,504 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 149 g CO2/km comb.
mpg: 5.7
Details

Good price

£13,690

£14,490

PE20 3JN Swineshead, Lincolnshire

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-3%

1 / 3

Used (2020) BMW 420 M Sport 190 HP | Good price

- 4 Series Convertible d [190] M

2020
43,626 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 156 g CO2/km comb.
mpg: 5.9
Details

Good price

£16,667

£17,273

E6 5LU Greater London, London

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1 / 2

Used (2020) BMW 420 M Sport 184 HP | Super price

- 4 Series Convertible i M Sport

2020
34,110 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
184 HP (135 kW)
CO2 emissions: 182 g CO2/km comb.
mpg: 8
Details

Super price

£16,995

S80 2QD Nottinghamshire, Nottinghamshire

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1 / 4

Used (2020) BMW 420 M Sport 190 HP | Super price

- 4 Series Convertible d [190] M

2020
41,852 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 156 g CO2/km comb.
mpg: 5.9
Details

Super price

£15,900

RG75JF

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Availability verified

-1%

1 / 3

Used (2020) BMW 420 M Sport 190 HP | Good price

- 4 Series d [190] M Sport 2dr

2020
37,993 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 149 g CO2/km comb.
mpg: 5.7
Details

Good price

£16,915

£17,253

E6 5LU Greater London, London

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-2%

1 / 3

Used (2020) BMW 420 M Sport 190 HP | Super price

- 4 Series Convertible d [190] M

2020
50,277 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 156 g CO2/km comb.
mpg: 5.9
Details

Super price

£15,349

£15,722

E6 5LU Greater London, London

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Carwow

2021

(2021) BMW 420 M Sport 184 HP

£15,749

Good price

You save £2,251

EH151BT

170 g CO2/km comb. - 184 HP (135 kW) - 7.4 Mpg

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£14,999

Good price

You save £1,201

WR37RL

182 g CO2/km comb. - 184 HP (135 kW) - 8.0 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£15,349

Super price

You save £2,651

E6 5LU Greater London, London

156 g CO2/km comb. - 190 HP (139 kW) - 5.9 Mpg

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£15,999

Super price

You save £3,201

SO150LP, Hampshire

182 g CO2/km comb. - 184 HP (135 kW) - 8.0 Mpg

-3%

1 / 4

Used (2020) BMW 420 Sport Line 190 HP | Good price

- 4 Series Convertible d [190]

2020
46,653 miles
Trim level: Sport Line
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 161 g CO2/km comb.
mpg: 5.9
Details

Good price

£13,500

£13,995

W5 5JN Greater London, London

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1 / 4

Used (2020) BMW 420 M Sport 184 HP | Super price

- 4 Series Convertible i M Sport

2020
49,787 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
184 HP (135 kW)
CO2 emissions: 182 g CO2/km comb.
mpg: 8
Details

Super price

£15,999

SO150LP, Hampshire

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1 / 4

Used (2020) BMW 420 M Sport 184 HP | Super price

- 4 Series Convertible i M Sport

2020
37,121 miles
Trim level: M Sport
2.0L Petrol
Cabriolet
Automatic
184 HP (135 kW)
CO2 emissions: 182 g CO2/km comb.
mpg: 8
Details

Super price

£16,995

RG263JE

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1 / 4

Used (2020) BMW 420 M Sport 190 HP | Good price

- 4 Series d [190] M Sport 2dr

2020
62,767 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 149 g CO2/km comb.
mpg: 5.7
Details

Good price

£15,850

£15,995

WR9 7DZ Worcestershire, Worcestershire

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Availability verified

Used (2020) BMW 420 M Sport 184 HP | Good price

- 4 Series i M Sport 2dr Auto

2020
45,988 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 170 g CO2/km comb.
mpg: 7.3
Details

Good price

£15,790

DL1 2LD Darlington, Durham

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Availability verified

1 / 4

Used (2020) BMW 420 M Sport 190 HP | Good price

- 4 Series Convertible d [190] M

2020
69,932 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 156 g CO2/km comb.
mpg: 5.9
Details

Good price

£14,300

LS270TS

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Availability verified

-2%

1 / 3

Used (2020) BMW 420 M Sport | Super price

4 Series Gran Coupe 2.0 d M Sport

2020
52,780 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Super price

£18,475

£18,975

Motors.co.uk

BL9 5BQ Greater Manchester, Manchester

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-6%

1 / 4

Used (2020) BMW 420 M Sport | Super price

4 Series 2.0 d M Sport Auto Euro 6

2020
50,118 miles
Trim level: M Sport
2.0L Diesel
Hatchback
Automatic
Details

Super price

£18,299

£19,468

Motors.co.uk

BL1 2ST Greater Manchester, Manchester

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-38%

1 / 4

Used (2020) BMW 420 M Sport 181 HP | Good price

4 Series i M Sport Coupe

Jan 2020
57,895 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 134 g CO2/km comb.
mpg: 46.3
Details

Good price

£16,990

£27,491

Bmw.co.uk

M41 7GF Stretford, Manchester

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-2%

1 / 4

Used (2020) BMW 420 M Sport 184 HP | Super price

4 Series 2.0 i GPF M Sport Coupe

2020
21,415 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Super price

£18,740

£19,270

Exchange and Mart

SK4 5EA Greater Manchester, Manchester

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Carwow

2020

(2020) BMW 420 M Sport 184 HP

£16,995

Super price

You save £3,705

RG263JE

182 g CO2/km comb. - 184 HP (135 kW) - 8.0 Mpg

Carwow

2019

(2019) BMW 420 M Sport 190 HP

£17,149

Fair price

Estimated price £16,717

TD9 8PZ Scottish Borders, Roxburghshire

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£14,197

Fair price

You save £503

NE29 7TE Tyne And Wear, Tyne And Wear

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£13,990

Fair price

Estimated price £13,903

NE83HL

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

-30%

1 / 4

Used (2020) BMW 420 M Sport 184 HP | Super price

4 Series i M Sport [Professional

Mar 2020
57,494 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 134 g CO2/km comb.
mpg: 46.3
Details

Super price

£16,000

£23,000

Honestjohn

PR22YQ Preston, Lancashire

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1 / 3

Used (2020) BMW 420 M Sport 184 HP | Good price

4 Series 2.0 i GPF M Sport Coupe

2020
35,181 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Good price

£18,299

Exchange and Mart

NP19 4PT Newport, Gwent

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1 / 4

Used (2020) BMW 420 M Sport 187 HP | Super price

4 Series d M Sport Convertible 2.0

2020
29,226 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
187 HP (137 kW)
CO2 emissions: 156 g CO2/km comb.
mpg: 47.1
Details

Super price

£21,500

Bmw.co.uk

B78 3HG Staffordshire, Staffordshire

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1 / 3

Used (2020) BMW 420 M Sport 184 HP | Good price

4 Series Gran Coupe 2.0 i GPF M

2020
56,438 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Good price

£16,490

Motors.co.uk

AL7 1AD Hertfordshire, Hertfordshire

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-1%

1 / 4

Used (2020) BMW 420 M Sport 190 HP | Super price

4 Series d [190] M Sport 2dr Auto

2020
30,335 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
Details

Super price

£19,200

£19,495

Motors.co.uk

RM13 9EB Wennington, London

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Carwow

2021

(2021) BMW 420 M Sport 184 HP

£15,624

Super price

You save £3,276

PO2 9QZ Hilsea, Hampshire

169 g CO2/km comb. - 184 HP (135 kW) - 7.3 Mpg

Carwow

2019

(2019) BMW 420 M Sport 190 HP

£13,995

Fair price

You save £5

RM13 8RH Greater London, London

156 g CO2/km comb. - 190 HP (139 kW) - 5.9 Mpg

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£16,995

Super price

You save £3,605

S80 2QD Nottinghamshire, Nottinghamshire

182 g CO2/km comb. - 184 HP (135 kW) - 8.0 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£15,850

Good price

You save £1,450

WR9 7DZ Worcestershire, Worcestershire

149 g CO2/km comb. - 190 HP (139 kW) - 5.7 Mpg

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BMW 420 (1000+)