2020 BMW 420 • Compare 98 used cars with valuation

Market overview: April-2026 Price Analysis: A used BMW 420 from 2020 currently costs between £10,495 and £23,700. On average, the mileage for this year stands at 58,725 miles. The depreciation and price trend over the last 12 months is -£1,560.

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Carwow

2021

(2021) BMW 420 M Sport 184 HP

£17,549

Super price

You save £3,151

TS183RW

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

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£16,455

Fair price

You save £45

W1H 7AB Greater London, London

160 g CO2/km comb. - 190 HP (139 kW) - 6.1 Mpg

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£16,599

Good price

You save £2,101

IP12DZ, Suffolk

158 g CO2/km comb. - 190 HP (139 kW) - 6.0 Mpg

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£16,699

Fair price

You save £701

PO29RN

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

Price checked by AutoUncle

Super price

Good price

Fair price

A bit pricey

Expensive

-3%

1 / 4

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

- 4 Series d [190] Sport 2dr Auto

2020
50,000 miles
Trim level: Sport Line
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 154 g CO2/km comb.
5.7 mpg
Details

Good price

£11,995

£12,395

NR318DF

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Availability verified

-1%

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.
5.7 mpg
Details

Good price

£15,750

£15,995

WR9 7DZ Worcestershire, Worcestershire

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1 / 3

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

- 4 Series Gran Coupe d [190] M

2020
43,537 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 151 g CO2/km comb.
5.8 mpg
Details

Good price

£16,340

£16,370

CM167NY

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Availability verified

-2%

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.
8 mpg
Details

Good price

£17,396

£17,758

E65LU

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Carwow

2020

(2020) BMW 420 M Sport 190 HP

£13,995

Fair price

You save £705

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

£13,750

Fair price

You save £450

SK1 3JG Greater Manchester, Manchester

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

Carwow

2021

(2021) BMW 420 M Sport 184 HP

£16,495

Super price

You save £4,505

DE737HL

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

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£16,995

Super price

You save £3,005

S80 2QD Nottinghamshire, Nottinghamshire

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

-4%

1 / 3

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

- 4 Series Convertible d [190] M

2020
68,132 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 156 g CO2/km comb.
5.9 mpg
Details

Good price

£14,512

£15,130

E65LU

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Availability verified

-3%

1 / 3

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

- 4 Series Convertible d [190] M

2020
52,487 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 156 g CO2/km comb.
5.9 mpg
Details

Good price

£18,540

£19,293

RM13 8RH Greater London, London

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Availability verified

-2%

1 / 3

Used (2020) BMW 420 M Sport 190 HP | Super 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.
5.9 mpg
Details

Super price

£16,766

£17,273

E6 5LU Greater London, London

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Availability verified

-5%

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.
6 mpg
Details

Good price

£16,599

£17,649

IP12DZ, Suffolk

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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.
5.7 mpg
Details

Good price

£16,941

£17,253

E6 5LU Greater London, London

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Availability verified

-5%

1 / 4

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

- 4 Series Gran Coupe d [190] M

2020
48,250 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 151 g CO2/km comb.
5.8 mpg
Details

Good price

£15,990

£16,995

W1H7AB

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Carwow

2021

(2021) BMW 420 M Sport 184 HP

£13,995

Good price

You save £2,005

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

£14,795

Fair price

You save £1,105

PR15EB

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

Carwow

2021

(2021) BMW 420 M Sport 184 HP

£15,990

Super price

You save £3,910

EN92BL

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

Carwow

2019

(2019) BMW 420 M Sport 190 HP

£15,440

Fair price

Estimated price £15,408

G3 6ED Glasgow City, Glasgow

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

1 / 4

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

- 4 Series Gran Coupe d [190] M

2020
73,778 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 151 g CO2/km comb.
5.8 mpg
Details

Good price

£12,990

NE83HL

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Availability verified

-6%

1 / 4

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

- 4 Series d [190] M Sport 2dr

2020
103,000 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 149 g CO2/km comb.
5.7 mpg
Details

Good price

£10,299

£11,000

CV79FU

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Availability verified

-2%

1 / 4

Used (2020) BMW 420 M Sport 184 HP | Good 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.
7.8 mpg
Details

Good price

£15,840

£16,295

W1H 7AB Greater London, London

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Availability verified

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.
8 mpg
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.
5.9 mpg
Details

Super price

£15,900

RG75JF

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Availability verified

-3%

1 / 4

Used (2020) BMW 420 Sport Line 190 HP | Super 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.
5.9 mpg
Details

Super price

£13,500

£13,995

W5 5JN Greater London, London

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Availability verified

New

1 / 4

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

- 4 Series Gran Coupe d [190] M

2020
77,484 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 151 g CO2/km comb.
5.8 mpg
Details

Good price

£12,999

SA18QB

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Availability verified

New

1 / 4

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

- 4 Series Gran Coupe d [190]

2020
108,489 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 160 g CO2/km comb.
6.1 mpg
Details

Super price

£9,499

SA18QB

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Availability verified

New

1 / 4

Used (2020) BMW 420 M Sport 180 HP | Good price

4 Series Gran Coupe i xDrive M

2020
40,090 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
180 HP (132 kW)
Details

Good price

£18,999

Buyacar

Delivered to you

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-23%

1 / 4

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

4 Series d M Sport Convertible 2.0

Sep 2020
20,735 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 157 g CO2/km comb.
47.1 mpg
Details

Super price

£22,990

£30,000

Bmw.co.uk

W1K 7TT Greater London, London

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Carwow

2020

(2020) BMW 420 M Sport 190 HP

£19,999

Fair price

You save £501

EH151BT

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

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£14,512

Good price

You save £1,688

E65LU

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

Carwow

2020

(2020) BMW 420 M Sport 184 HP

£15,000

Fair price

Estimated price £14,768

B33 0LD West Midlands, West Midlands

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

Carwow

2021

(2021) BMW 420 M Sport 184 HP

£15,349

Good price

You save £1,651

EH151BT

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

-31%

1 / 4

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

4 Series d M Sport Convertible 2.0

Mar 2020
49,843 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 132 g CO2/km comb.
44.8 mpg
Details

Super price

£18,746

£27,495

Bmw.co.uk

NE36 0BQ West Boldon, Tyne And Wear

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1 / 3

Used (2020) BMW 420 M Sport | Good price

4 Series d [190] M Sport 2dr Auto

2020
73,531 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Good price

£15,990

Motors.co.uk

LE2 1RH Leicester, Leicestershire

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1 / 4

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

4 Series i M Sport 5dr Auto

2020
31,000 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Super price

£15,250

Motors.co.uk

DY10 2JL Kidderminster, Worcestershire

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-1%

1 / 4

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

4 Series Gran Coupe 2.0 d M Sport

2020
68,973 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
Details

Good price

£15,740

£15,970

Exchange and Mart

SK4 5EA Greater Manchester, Manchester

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-4%

1 / 4

Used (2020) BMW 420 M Sport | Super price

4 Series d [190] M Sport 2dr Auto

2020
50,700 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Super price

£16,250

£16,995

Motors.co.uk

BN3 5LE Brighton And Hove, East Sussex

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Carwow

2021

(2021) BMW 420 M Sport 184 HP

£16,995

Fair price

You save £1,005

OX20LX

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

Carwow

2020

(2020) BMW 420 M Sport 190 HP

£15,990

Good price

You save £1,110

W1H7AB

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

Carwow

2021

(2021) BMW 420 M Sport 184 HP

£18,300

Super price

You save £3,400

S60 5BD Catcliffe, South Yorkshire

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

Carwow

2019

(2019) BMW 420 M Sport 190 HP

£17,149

Fair price

Estimated price £16,655

TD9 8PZ Scottish Borders, Roxburghshire

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

Showing 1 - 25 of 97 results

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Good price

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See BMW 420

BMW 420 (1000+)