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BMW 420 Cabriolet Valuation: 0 used car listings analysed

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Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2021 Blue Cabriolet
(2021) BMW 420 Cabriolet M Sport 184 HP
£24,791

Fair price

Estimated price £24,319
EX28FD Exeter, Devon

154 g CO2/km comb. - 184 HP (135 kW) - 39.8 Mpg

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2023 White Cabriolet
(2023) BMW 420 Cabriolet M Sport 184 HP
£27,544

Fair price

You save £756
LE12 7AT Mountsorrel, Leicestershire

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

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2022 Black Cabriolet
(2022) BMW 420 Cabriolet M Sport 184 HP
£26,272

Fair price

Estimated price £25,855
NG31 7UH Lincolnshire, Lincolnshire

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

Carwow

Used BMW 420 Cabriolet M Sport 190 HP (139 kW) 2022 White Cabriolet
(2022) BMW 420 Cabriolet M Sport 190 HP
£24,070

Fair price

You save £330
SW17 0HB Greater London, London

129 g CO2/km comb. - 190 HP (139 kW) - 4.9 Mpg

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Expensive

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Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2023 Green Cabriolet
(2023) BMW 420 Cabriolet M Sport 184 HP
£27,895

Fair price

You save £305
CB10 2FN Little Sampford, Essex

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

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2021 Black Cabriolet
(2021) BMW 420 Cabriolet M Sport 184 HP
£25,295

Fair price

Estimated price £25,005
S80 2QD Nottinghamshire, Nottinghamshire

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

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2022 Black Cabriolet
(2022) BMW 420 Cabriolet M Sport 184 HP
£27,200

Fair price

You save £300
CM1 3BH Essex, Essex

154 g CO2/km comb. - 184 HP (135 kW) - 40.9 Mpg

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2023 Grey Cabriolet
(2023) BMW 420 Cabriolet M Sport 184 HP
£28,749

Fair price

Estimated price £27,938
S9 1XZ Park, South Yorkshire

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

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Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2020 Black Cabriolet
(2020) BMW 420 Cabriolet M Sport 184 HP
£17,693

Super price

You save £4,707
RM13 8RH Greater London, London

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

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2020 Black Cabriolet
(2020) BMW 420 Cabriolet M Sport 184 HP
£18,499

Super price

You save £4,301
PE32 1DD Pott Row, Norfolk

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

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2019 White Cabriolet
(2019) BMW 420 Cabriolet M Sport 184 HP
£16,553

Super price

You save £3,647
RM13 8RH Greater London, London

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

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2019 White Cabriolet
(2019) BMW 420 Cabriolet M Sport 184 HP
£17,999

Super price

You save £2,401
RM13 8RH Greater London, London

182 g CO2/km comb. - 184 HP (135 kW) - 34.4 Mpg

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Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2015 Blue Cabriolet
(2015) BMW 420 Cabriolet M Sport 184 HP
£14,440

Fair price

You save £660
G52 4UJ Hillington, Renfrewshire

131 g CO2/km comb. - 184 HP (135 kW) - 56.0 Mpg

Carwow

Used BMW 420 Cabriolet Sport Line 190 HP (139 kW) 2020 Black Cabriolet
(2020) BMW 420 Cabriolet Sport Line 190 HP
£15,920

Super price

You save £3,680
DN25DX Doncaster, South Yorkshire

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

Carwow

Used BMW 420 Cabriolet M Sport 184 HP (135 kW) 2015 Black Cabriolet
(2015) BMW 420 Cabriolet M Sport 184 HP
£12,350

Fair price

You save £550
DE21 4AP Derby, Derbyshire

131 g CO2/km comb. - 184 HP (135 kW) - 56.0 Mpg

Carwow

Used BMW 420 Cabriolet M Sport 190 HP (139 kW) 2017 Grey Cabriolet
(2017) BMW 420 Cabriolet M Sport 190 HP
£10,495

Fair price

You save £605
WF5 9TP Wakefield, West Yorkshire

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

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Sandicliffe.co.uk

New MG HS Trophy 224 HP (164 kW) 2025 Metallic black pearl SUV
(2025) MG HS Trophy 224 HP
£22,890

Good price

You save £1,910
LN2 4LD Lincolnshire, Lincolnshire

126 g CO2/km comb. - 224 HP (164 kW) - 85.6 Mpg

Sandicliffe.co.uk

Used Ford Kuga ST-Line 243 HP (178 kW) 2024 Silver SUV
(2024) Ford Kuga ST-Line 243 HP
£20,907

Good price

You save £1,493
LE2 6BW Leicester, Leicestershire

123 g CO2/km comb. - 243 HP (178 kW) - 80.7 Mpg

Sandicliffe.co.uk

New MG HS SE 224 HP (164 kW) 2026 Metallic hampstead grey SUV
(2026) MG HS SE 224 HP
£20,192

Good price

You save £2,308
LN2 4LD Lincolnshire, Lincolnshire

126 g CO2/km comb. - 224 HP (164 kW) - 5.5 Mpg

Sandicliffe.co.uk

New MG HS SE 224 HP (164 kW) 2025 Metallic black pearl SUV
(2025) MG HS SE 224 HP
£20,192

Good price

You save £2,308
LN2 4LD Lincolnshire, Lincolnshire

126 g CO2/km comb. - 224 HP (164 kW) - 85.6 Mpg

Showing 1 - 25 of 232 results

How much does the BMW 420 Cabriolet depreciate?

Used BMW 420 Cabriolet

A used BMW 420 Cabriolet (2022) model loses about £2 per month in value.


Factors that affect the depreciation of a BMW 420 Cabriolet:
- Mileage driven
- Maintenance
- Service history


Depreciation is an important part of calculating the total cost of owning a BMW 420 Cabriolet. In addition to the monthly depreciation of £2, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly cost.

Comparison of BMW 420 Cabriolet variants and prices

No market data available

BMW 420 Cabriolet (model year 2022) - Price development for the last 2 months and price projection for the next 6 months (August 2026 - March 2027)

Monthly price data with average prices and price ranges

Month

Average market price

Lowest market price

Highest market price

Calculation method

2026 - August
£28,940
£27,360£30,500
Estimate
2026 - September
£28,920↘
£27,040£30,800
Estimate
2026 - November
£28,900↘
--
Forecast
2026 - December
£28,900→
--
Forecast
2027 - January
£28,880↘
--
Forecast
2027 - February
£28,880→
--
Forecast
2027 - March
£28,860↘
--
Forecast

All estimates and forecasts are based on actual market data

Last updated: 1 October 2026

Average Monthly Depreciation

A summary of the past 12 and an estimation of the next 6 months.

Past 12 months

-£20

Next 6 months

-£60

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Price checked by AutoUncle

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Good price

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Expensive

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