BMW 420 (diesel) • 620 cars with Valuation

Market overview: Diesel BMW 420 (May-2026): There are currently 620 used diesel BMW 420 cars for sale. Prices range from £6,900 to £27,485, with a median price of £13,250. AutoUncle has identified 128 cars as being offered below market price. The typical selling time for a diesel BMW 420 is approximately 28 days, and 46.9% of the listings have recently been reduced in price (Source: AutoUncle market data, May-2026).

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Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Fair price

Estimated price £10,496

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Fair price

Estimated price £9,965

S80 2QD Nottinghamshire, Nottinghamshire

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Good price

You save £1,405

NE12 9SW Longbenton, Tyne And Wear

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Good price

You save £1,300

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

Price checked by AutoUncle

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Good price

Fair price

A bit pricey

Expensive

New

1 / 4

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

- 4 Series Convertible d [190] M

2020
83,000 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

£13,495

£12,495

LE167TB

Availability verified

New

1 / 2

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

- 4 Series d [190] M Sport 2dr

2020
79,900 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

Super price

£10,994

OL84PQ

Availability verified

-4%

1 / 4

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

- 4 Series d [190] M Sport 2dr

2020
98,700 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

£10,495

£10,995

YO322RJ

Availability verified

-10%

1 / 4

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

- 4 Series d [190] M Sport 2dr

2020
27,824 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

£18,249

£20,399

EH151BT

Availability verified

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Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Cabriolet

(2020) BMW 420 M Sport 190 HP

Good price

You save £1,005

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Grey Cabriolet

(2019) BMW 420 M Sport 190 HP

Fair price

RM13 8RH Greater London, London

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Super price

You save £2,106

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Black Coupe

(2019) BMW 420 M Sport 190 HP

Fair price

BB1 3JA Blackburn, Lancashire

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

-7%

1 / 2

Used (2014) BMW 420 Comfort Edition 184 HP | Super price

4 Series 2.0 d SE Coupe 2dr Diesel

2014
105,000 miles
Trim level: Comfort Edition
2.0L Diesel
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 121 g CO2/km comb.
4.6 mpg
Details

Super price

£6,490

£6,990

BL2 2BD Greater Manchester, Manchester

Availability verified

-2%

1 / 3

Used (2019) BMW 420 M Sport 190 HP | Good price

- 4 Series Gran Coupe d [190] M

2019
104,499 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

£11,985

£12,347

RM13 8RH Greater London, London

Availability verified

1 / 4

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

- 4 Series Gran Coupe d [190] M

2020
62,109 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

£13,900

£14,000

DN12HJ

Availability verified

-7%

1 / 4

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

- 4 Series Gran Coupe d [190] M

2020
74,943 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

£12,995

£13,995

NE12 9SW Longbenton, Tyne And Wear

Availability verified

-11%

1 / 4

Used (2013) BMW 420 Luxury Line 184 HP | Super price

- 4 Series d xDrive Luxury 2dr

2013
73,201 miles
Trim level: Luxury Line
2.0L Diesel
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 124 g CO2/km comb.
4.7 mpg
Details

Super price

£7,995

£8,990

HX1 4EX West Yorkshire, West Yorkshire

Availability verified

1 / 1

Used (2016) BMW 420 Luxury Line 190 HP | Good price

- 4 Series Gran Coupe d [190]

2016
103,859 miles
Trim level: Luxury Line
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 114 g CO2/km comb.
4.3 mpg
Details

Good price

£8,490

EX11 1RE Devon, Devon

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Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Blue Coupe

(2019) BMW 420 M Sport 190 HP

Fair price

G3 6ED Glasgow City, Glasgow

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Fair price

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

Carwow

Used BMW 420 Sport Line 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 Sport Line 190 HP

Fair price

Estimated price £12,321

DE73 7HL Stenson, Derbyshire

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Cabriolet

(2020) BMW 420 M Sport 190 HP

Good price

You save £1,480

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

-2%

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

£15,490

£15,900

RG75JF

Availability verified

-5%

1 / 4

Used (2017) BMW 420 Sport Line 190 HP | Good price

- 4 Series Gran Coupe d [190]

2017
121,000 miles
Trim level: Sport Line
2.0L Diesel
Coupe
Manual
190 HP (139 kW)
CO2 emissions: 129 g CO2/km comb.
4.9 mpg
Details

Good price

£6,900

£7,300

CM94LL

Availability verified

1 / 2

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

- 4 Series Gran Coupe d [190]

2020
46,120 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

Good price

£15,995

LE10 3DJ Leicestershire, Leicestershire

Availability verified

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

Availability verified

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

Availability verified

-5%

1 / 3

Used (2014) BMW 420 Comfort Edition 184 HP | Good price

4 Series d SE 5dr

2014
65,565 miles
Trim level: Comfort Edition
2.0L Diesel
Coupe
Manual
184 HP (135 kW)
CO2 emissions: 124 g CO2/km comb.
4.7 mpg
Details

Good price

£8,995

£9,495

TS9 5JQ Stokesley, North Yorkshire

Availability verified

New

1 / 4

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

- 4 Series Convertible d [190] M

2020
77,500 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

£13,920

UB111FW

Availability verified

1 / 4

Used (2019) BMW 420 M Sport 190 HP | Super price

- 4 Series Gran Coupe d [190]

2019
49,306 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
CO2 emissions: 136 g CO2/km comb.
6.1 mpg
Details

Super price

£13,499

SO150LP, Hampshire

Availability verified

-5%

1 / 4

Used (2019) BMW 420 Comfort Edition | Super price

4 Series d [190] SE 5dr [Business

2019
108,500 miles
Trim level: Comfort Edition
2.0L Diesel
Coupe
Manual
Details

Super price

£8,475

£8,950

Motors.co.uk

TW16 7BB Surrey, Surrey

-27%

1 / 3

Used (2023) BMW 420 M Sport 190 HP | Super price

4 Series d M Sport Convertible 2.0

2023
12,678 miles
Trim level: M Sport
2.0L Diesel
Cabriolet
Automatic
190 HP (139 kW)
CO2 emissions: 136 g CO2/km comb.
54.3 mpg
Details

Super price

£32,000

£44,000

Bmw.co.uk

AB12 3EW Aberdeen, Aberdeen

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Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Black Coupe

(2019) BMW 420 M Sport 190 HP

Fair price

LE10 3DJ Leicestershire, Leicestershire

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Coupe

(2019) BMW 420 M Sport 190 HP

Super price

You save £3,601

SO150LP, Hampshire

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Good price

You save £1,805

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Fair price

Estimated price £13,677

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

-1%

1 / 4

Used (2018) BMW 420 M Sport 190 HP | Good price

4 Series Gran Coupe 2.0 d M Sport

2018
81,915 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
190 HP (139 kW)
Details

Good price

£12,199

£12,399

Motors.co.uk

YO19 4SH Crockey Hill, North Yorkshire

1 / 4

Used (2015) BMW 420 Sport Line | Super price

4 Series d [190] Sport 5dr Auto

2015
75,000 miles
Trim level: Sport Line
2.0L Diesel
Coupe
Automatic
Details

Super price

£7,990

£7,999

Motors.co.uk

B70 7EZ West Midlands, West Midlands

-3%

1 / 4

Used (2022) BMW 420 M Sport | Super price

4 Series d xDrive MHT M Sport 2dr

2022
34,867 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Super price

£24,973

£25,845

Motors.co.uk

BR6 7QR Greater London, London

-4%

1 / 3

Used (2020) BMW 420 M Sport | Super price

4 Series d [190] M Sport 2dr Auto

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

Super price

£15,200

£15,990

Motors.co.uk

LE2 1RH Leicester, Leicestershire

-19%

1 / 4

Used (2015) BMW 420 M Sport | Super price

4 Series 2.0 d xDrive M Sport

2015
105,078 miles
Trim level: M Sport
2.0L Diesel
Coupe
Automatic
Details

Super price

£6,450

£7,995

Motors.co.uk

UB2 4HB Greater London, London

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Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Silver Coupe

(2019) BMW 420 M Sport 190 HP

Good price

You save £1,115

RM13 8RH Greater London, London

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Grey Coupe

(2019) BMW 420 M Sport 190 HP

Fair price

DH3 3HE County Durham, Durham

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2020 Coupe

(2020) BMW 420 M Sport 190 HP

Fair price

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

Carwow

Used BMW 420 M Sport 190 HP (139 kW) 2019 Black Cabriolet

(2019) BMW 420 M Sport 190 HP

Fair price

PO2 9QZ Hilsea, Hampshire

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

Showing 1 - 25 of 616 results

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