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BMW 420 Gran Coupé (petrol) • 158 cars with Valuation

Market overview: Petrol BMW 420 Gran Coupé (September-2026): There are currently 158 used petrol BMW 420 Gran Coupé cars for sale. Prices range from £13,697 to £43,915, with a median price of £33,947. AutoUncle has identified 27 cars as being offered below market price. The typical selling time for a petrol BMW 420 Gran Coupé is approximately 30 days, and 67.8% of the listings have recently been reduced in price (Source: AutoUncle market data, September-2026).

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New BMW 420 Gran Coupé M Sport 184 HP (135 kW) 2025 Coupe

(2025) BMW 420 Gran Coupé M Sport 184 HP

Good price

You save £2,710

NE360BQ Gateshead, Tyne And Wear

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

Carwow Leasing

New BMW 420 Gran Coupé M Sport 184 HP (135 kW) 2026 Coupe

(2026) BMW 420 Gran Coupé M Sport 184 HP

Fair price

Estimated price £47,693

NE360BQ Gateshead, Tyne And Wear

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

Carwow Leasing

New BMW 420 Gran Coupé M Sport 184 HP (135 kW) 2026 Coupe

(2026) BMW 420 Gran Coupé M Sport 184 HP

Good price

You save £2,234

DH11HP Gateshead, Durham

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

Carwow Leasing

New BMW 420 Gran Coupé M Sport 184 HP (135 kW) 2026 Coupe

(2026) BMW 420 Gran Coupé M Sport 184 HP

Fair price

Estimated price £47,693

TS183RB Gateshead, Durham

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

Price checked by AutoUncle

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1 / 1

New (2025) BMW 420 Gran Coupé M Sport 184 HP | Good 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.
6.6 mpg
Details

Good price

£44,990

£44,800

NE360BQ Gateshead, Tyne And Wear

Availability verified

1 / 1

New (2026) BMW 420 Gran Coupé M Sport 184 HP | Good price

- 4 Series Gran Coupe i M Sport

2026
10 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

Good price

£45,466

DH11HP Gateshead, Durham

Availability verified

-1%

1 / 4

Used (2021) BMW 420 Gran Coupé M Sport 184 HP | Super price

4 Series Gran Coupe 2021 M sport i

2021
64,894 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
CO2 emissions: 178 g CO2/km comb.
7.8 mpg
Details

Super price

£15,499

£15,699

IP256HW

Availability verified

-1%

1 / 4

Used (2021) BMW 420 Gran Coupé M Sport | Super price

4 Series 2.0 i xDrive M Sport Auto

2021
43,277 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
Details

Super price

£18,550

£18,750

Motors.co.uk

DE65 5FJ Hilton, Derbyshire

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Carwow Leasing

New BMW 420 Gran Coupé M Sport 184 HP (135 kW) 2026 Coupe

(2026) BMW 420 Gran Coupé M Sport 184 HP

Fair price

Estimated price £47,693

TS183RB Gateshead, Durham

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

Carwow

Used BMW 420 Gran Coupé M Sport 184 HP (135 kW) 2021 Coupe

(2021) BMW 420 Gran Coupé M Sport 184 HP

Super price

You save £3,601

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

Carwow

Used Audi A5 S-Line 299 HP (219 kW) 2025 White Estate

(2025) Audi A5 S-Line 299 HP

Fair price

Estimated price £35,621

NE29 7TE Tyne And Wear, Tyne And Wear

42 g CO2/km comb. - 299 HP (219 kW) - 1.8 Mpg

Carwow

Used Audi A5 S-Line 204 HP (150 kW) 2025 Black Estate

(2025) Audi A5 S-Line 204 HP

Fair price

OL1 2RL Greater Manchester, Manchester

160 g CO2/km comb. - 204 HP (150 kW) - 6.9 Mpg

-23%

1 / 4

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

4 Series Gran Coupe i M Sport 2.0

2025
8,274 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 154 g CO2/km comb.
41.5 mpg
Details

Good price

£32,990

£42,997

Bmw.co.uk

DE21 Derby, Derbyshire

-1%

1 / 4

Used (2022) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

Aug 2022
37,769 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

Good price

£25,650

£25,950

Dealer

LN6 9UH South Hykeham, Lincolnshire

1 / 2

Used (2023) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

Mar 2023
47,542 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

Good price

£26,795

£26,495

Dealer

IP1 6JZ Suffolk, Suffolk

-8%

1 / 3

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

4 Series Gran Coupe i M Sport 2.0

2025
3,590 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

Good price

£38,300

£42,000

Bmw.co.uk

AB12 3EW Aberdeen, Aberdeen

-27%

1 / 4

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

4 Series Gran Coupe i M Sport 2.0

2025
3,729 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

Good price

£35,590

£48,993

Bmw.co.uk

DE21 Derby, Derbyshire

-1%

1 / 4

Used (2026) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2026
2,826 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

Good price

£38,450

£39,000

Bmw.co.uk

SL6 0BW Maidenhead, Buckinghamshire

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Used Audi A5 S-Line 150 HP (110 kW) 2024 Black Sedan

(2024) Audi A5 S-Line 150 HP

Good price

You save £1,750

WA5 7YD Warrington, Cheshire

156 g CO2/km comb. - 150 HP (110 kW) - 6.8 Mpg

Carwow

Used Audi A5 S-Line 150 HP (110 kW) 2025 Blue Estate

(2025) Audi A5 S-Line 150 HP

Fair price

HP7 9JD Buckinghamshire, Buckinghamshire

158 g CO2/km comb. - 150 HP (110 kW) - 6.9 Mpg

Carwow

Used Audi A5 Sport 299 HP (219 kW) 2026 Black Estate

(2026) Audi A5 Sport 299 HP

Good price

You save £1,665

L5 9XN Merseyside, Merseyside

41 g CO2/km comb. - 299 HP (219 kW) - 1.8 Mpg

Carwow

Used Audi A5 150 HP (110 kW) 2025 Black Estate

(2025) Audi A5 150 HP

Fair price

Estimated price £36,454

OL1 2RL Greater Manchester, Manchester

164 g CO2/km comb. - 150 HP (110 kW) - 7.2 Mpg

-9%

1 / 4

Used (2022) BMW 420 Gran Coupé M Sport 181 HP | Super price

4 Series Gran Coupe i M Sport 2.0

2022
48,586 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 154 g CO2/km comb.
41.5 mpg
Details

Super price

£21,555

£23,906

Bmw.co.uk

SN5 8WG Swindon, Wiltshire

1 / 4

Used (2026) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2026
6,081 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

Good price

£37,995

Bmw.co.uk

RG17 0EL Hungerford, Berkshire

-6%

1 / 4

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

4 Series Gran Coupe i M Sport 2.0

2025
3,474 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

Good price

£35,679

£37,999

Bmw.co.uk

CW1 6XH Cheshire East, Cheshire

1 / 2

Used (2016) BMW 420 Gran Coupé Luxury Line 181 HP | Good price

4 Series i LUXURY

2016
59,652 miles
Trim level: Luxury Line
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
Details

Good price

£11,990

Motors.co.uk

TN5 7QR Flimwell, East Sussex

-2%

1 / 4

Used (2026) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2026
4,200 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

Good price

£38,000

£39,000

Bmw.co.uk

WR4 9FA Worcestershire, Worcestershire

-4%

1 / 4

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

4 Series Gran Coupe i M Sport 2.0

2025
10,129 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

Good price

£34,990

£36,790

Bmw.co.uk

SO53 3YU Cross Rise, Hampshire

-4%

1 / 4

Used (2022) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2022
46,696 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 154 g CO2/km comb.
41.5 mpg
Details

Good price

£23,790

£24,999

Bmw.co.uk

PH1 3GA Perth And Kinross, Perth And Kinross

-3%

1 / 4

Used (2026) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2026
5,500 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 154 g CO2/km comb.
41.5 mpg
Details

Good price

£37,500

£39,000

Bmw.co.uk

IG10 3UE Essex, Essex

1 / 4

Used (2024) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2024
43,437 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 154 g CO2/km comb.
41.5 mpg
Details

Good price

£28,500

Bmw.co.uk

IG10 3UE Essex, Essex

-5%

1 / 4

Used (2026) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2026
3,121 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

Good price

£37,500

£39,500

Bmw.co.uk

SA5 8LW Cwmbwrla, West Glamorgan

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Used Audi A5 150 HP (110 kW) 2025 Red Sedan

(2025) Audi A5 150 HP

Fair price

You save £1,110

B78 3JF Staffordshire, Staffordshire

161 g CO2/km comb. - 150 HP (110 kW) - 7.1 Mpg

Carwow

Used Audi A5 S-Line 299 HP (219 kW) 2025 White Estate

(2025) Audi A5 S-Line 299 HP

Fair price

Estimated price £35,833

NE29 7TE Tyne And Wear, Tyne And Wear

42 g CO2/km comb. - 299 HP (219 kW) - 1.8 Mpg

Carwow

Used Audi A5 Sport 299 HP (219 kW) 2026 White Sedan

(2026) Audi A5 Sport 299 HP

Fair price

Estimated price £35,277

B62 8RD West Midlands, West Midlands

40 g CO2/km comb. - 299 HP (219 kW) - 1.8 Mpg

Carwow

Used Audi A5 S-Line 150 HP (110 kW) 2025 Grey Estate

(2025) Audi A5 S-Line 150 HP

Fair price

Estimated price £33,349

OL1 2RL Greater Manchester, Manchester

158 g CO2/km comb. - 150 HP (110 kW) - 6.9 Mpg

-14%

1 / 3

Used (2019) BMW 420 Gran Coupé M Sport 184 HP | Good price

4 Series Gran Coupe 2.0 i GPF M

2019
45,938 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
184 HP (135 kW)
Details

Good price

£14,595

£16,995

Motors.co.uk

LA3 3FB Lancashire, Lancashire

-13%

1 / 4

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

4 Series Gran Coupe i M Sport 2.0

2025
4,638 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

Good price

£34,650

£39,900

Bmw.co.uk

PL6 8LD Longbridge, Devon

-3%

1 / 4

Used (2026) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2026
4,167 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

Good price

£37,750

£38,950

Bmw.co.uk

TR10 8AD Cornwall, Cornwall

-15%

1 / 4

Used (2026) BMW 420 Gran Coupé M Sport 181 HP | Good price

4 Series Gran Coupe i M Sport 2.0

2026
6,950 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 154 g CO2/km comb.
41.5 mpg
Details

Good price

£38,000

£45,000

Bmw.co.uk

SY1 4AQ Shropshire, Shropshire

-13%

1 / 4

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

4 Series Gran Coupe i M Sport 2.0

2025
9,615 miles
Trim level: M Sport
2.0L Petrol
Coupe
Automatic
181 HP (133 kW)
CO2 emissions: 153 g CO2/km comb.
42.2 mpg
Details

Good price

£33,898

£38,999

Bmw.co.uk

EH28 8TH Edinburgh, Edinburgh

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New Audi A5 Sport 150 HP (110 kW) 2026 Estate

(2026) Audi A5 Sport 150 HP

Good price

You save £2,566

RH14 9AZ Five Oaks, West Sussex

157 g CO2/km comb. - 150 HP (110 kW) - 6.8 Mpg

Carwow

Used Audi A5 S-Line 150 HP (110 kW) 2025 Black Sedan

(2025) Audi A5 S-Line 150 HP

Super price

You save £3,401

CW7 Cheshire West And Chester, Cheshire

156 g CO2/km comb. - 150 HP (110 kW) - 6.6 Mpg

Carwow

Used Audi A5 S-Line 299 HP (219 kW) 2025 Grey Estate

(2025) Audi A5 S-Line 299 HP

Good price

You save £2,200

CM1 3BH Essex, Essex

42 g CO2/km comb. - 299 HP (219 kW) - 1.8 Mpg

Carwow

Used Audi A5 Black Edition 150 HP (110 kW) 2026 White Estate

(2026) Audi A5 Black Edition 150 HP

Fair price

Estimated price £38,034

SY1 3GA Shropshire, Shropshire

159 g CO2/km comb. - 150 HP (110 kW) - 6.9 Mpg

Showing 1 - 25 of 143 results

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