BMW 420 Valuation: 1,453 used car listings analysed

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How much does the BMW 420 depreciate?

Used BMW 420

A used BMW 420 (2026) model loses about £90 per month in value.


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


Depreciation is an important part of calculating the total cost of owning a BMW 420. In addition to the monthly depreciation of £90, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly cost.

How much does a used BMW 420 cost? Prices, ratings and depreciation by model year

How much does a used BMW 420 cost? Prices, ratings and depreciation by model year

Model year

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

2026 BMW 420

£25,678 - £54,615£44,2502,000 miles-£1,080184

2025 BMW 420

£34,000 - £52,298£40,5695,300 miles-£4,42083

2024 BMW 420

£29,398 - £41,234£35,46716,600 miles-£4,92030

2023 BMW 420

£25,977 - £35,550£30,07127,200 miles-£3,72078

2022 BMW 420

£22,359 - £31,173£26,43534,100 miles-£4,420144

2021 BMW 420

£14,495 - £30,000£23,58443,000 miles-£6,560112

2020 BMW 420

£10,680 - £24,505£16,92051,300 miles-£2,02097

2019 BMW 420

£11,720 - £19,616£15,74860,100 miles-£1,480137

2018 BMW 420

£10,663 - £18,024£14,48364,000 miles-£1,080174

2017 BMW 420

£7,965 - £15,513£12,21679,700 miles-£1,380121

2016 BMW 420

£7,155 - £14,790£10,81388,400 miles-£1,120119

2015 BMW 420

£6,300 - £13,993£9,81494,900 miles-£1,12088

2014 BMW 420

£5,961 - £12,671£8,82798,800 miles-£82076

2013 BMW 420

£6,645 - £10,195£8,19594,000 miles-£34011

*The 'Price range' column shows the prices at the 5th and 95th percentiles of cars in the current market

The data is based on the cars currently listed on AutoUncle

Comparison of BMW 420 variants and prices

Below you can compare prices and depreciation for the 5 most popular BMW 420 variants. The table is updated daily with data from the market in United Kingdom.

Comparison of BMW 420 variants and prices

Variant

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

🏆 The most popular

BMW 420 M Sport

£8,750 - £49,997£23,22246,100 miles-£1,6801,329

BMW 420 Sport Line

£5,995 - £17,585£11,20575,400 miles-£1,50063

BMW 420 Comfort Edition

£5,996 - £15,659£10,63481,000 miles-£1,26013
📈 The best value

BMW 420 Luxury Line

£6,283 - £12,500£9,26386,800 miles-£94029
💰 The budget choice

BMW 420 Performance

£5,645 - £12,888£8,89798,000 miles-14

*The 'Price range' column shows the prices at the 5th and 95th percentiles of cars in the current market

The data is based on the cars currently listed on AutoUncle

Which variant should you choose?

💰 The budget choice

The Performance is the cheapest entry point with an average price of £8,897.

🏆 The most popular

There are the most M Sport for sale right now (1329), which gives you the most options to choose from.

📈 The best value

The Luxury Line has held its price stable with minimal loss in value over the past year (-£940).

BMW 420 (model year 2026) - Price development for the last 7 months and price projection for the next 6 months (January 2026 - January 2027)

Monthly price data with average prices and price ranges

Month

Average market price

Lowest market price

Highest market price

Calculation method

2026 - January
£46,500
£38,260£54,720
Estimate
2026 - February
£44,620
£36,880£52,360
Estimate
2026 - March
£47,320
£42,240£52,400
Estimate
2026 - April
£46,420
£40,200£52,640
Estimate
2026 - May
£46,820
£41,840£51,800
Estimate
2026 - June
£44,740
£38,160£51,300
Estimate
2026 - July
£45,420
£39,240£51,580
Estimate
2026 - September
£45,720
--
Forecast
2026 - October
£45,880
--
Forecast
2026 - November
£46,040
--
Forecast
2026 - December
£46,200
--
Forecast
2027 - January
£46,360
--
Forecast

All estimates and forecasts are based on actual market data

Average Monthly Depreciation

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

Past 12 months

-£1,080

Next 6 months

£940

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Should your next car be the impressive BMW 420?

The BMW 420 is celebrated for its outstanding driving comfort and highlights numerous design awards. AutoUncle offers an impressive selection of 1,491 cars in the UK collected from numerous dealership websites and online marketplaces.

What should I pay for a used BMW 420?

Currently, the prices for a pre-owned BMW 420 start at £8,295 and go up to £43,450.

There are five main elements that affect what a pre-owned BMW 420 might cost: year of production, engine size and performance, fuel efficiency of the car, vehicle mileage as well as equipment level.

For instance, a car that is newer and has fewer miles on the clock will typically command a higher price. In the same vein, models at the higher end, replete with luxurious features or more robust engines, generally come with a more substantial price tag than, for example, an older model with more kilometres driven or with a lower equipment level.

How many equipment variants are there for the BMW 420?

When evaluating the costs of pre-owned BMW 420, it is important that you exclusively compare with the sale prices of cars with a similar engine and equipment. Otherwise, you may end up reaching a wrong conclusion on which car to purchase.

Which fuel types does the BMW 420 come with?

The predominant fuel variant for the BMW 420 is petrol.

BMW 420 fuel types:

  • BMW 420 petrol: 826 cars currently available with an average price of £27,412
  • BMW 420 diesel: 640 cars currently available with an average price of £14,829
  • BMW 420 plug-in hybrid: Currently there is 25 cars available on AutoUncle with an average price of £26,865

In the process of choosing a fuel type, don’t overlook the importance of your driving habits. Do you only use your car to get to and from work? Is the distance less than roughly 35 miles each way?

For short journeys, electric cars, plug-in hybrids or petrol cars are obvious choices. For longer daily commutes, a modern electric car is often suitable - especially if you can charge at home or at work. Diesel cars may still be relevant in some cases with very long journeys and lack of charging options. Take into account that several countries restrict high-emission diesel engines from their city zones.

Are there more body variants of BMW 420?

Coupe is a favourite among drivers of the BMW 420. The coupe as a body type prioritises style and sporty driving. Compared to a sedan or an SUV, the chassis tends to be tighter and stronger. This body type is mostly for people without children, who usually travel light. This style is often more expensive than equivalent sedan or hatchback sister models.

How does the price vary depending on the BMW 420 body type?

  • BMW 420 coupe: 1,136 cars - average price £21,054
  • BMW 420 cabriolet: 273 cars - average price £25,683
  • BMW 420 hatchback](https://www.autouncle.co.uk/en-gb/used-cars/BMW/420/b-hatchback): 67 cars - average price £23,099
  • BMW 420 sedan: 6 cars - average price £19,013

Which cars can be an alternative to the BMW 420?

Despite being an extremely The BMW 420 has a number of competitors.

Top competitors to the BMW 420

  • Audi TT
  • Mazda MX5
  • Porsche Taycan

With a current inventory of 949 available models on AutoUncle, the Audi TT stands out as the top alternative to the BMW 420. Average listing price for the Audi TT is £13,199.

The Mazda MX5 is another popular pick, with 556 cars currently for sale and an average price of £15,000. The Porsche Taycan is the third best alternative. There are currently 536 of this car for sale in the UK with an average sales price of £52,100.

Evaluating the option of an electric car?

If your choice is not strictly limited to the BMW 420 then, we can offer a selection of electric car alternatives in the car segment S-segment. Below are:

Still searching for the ideal electric vehicle? Examine our full lineup of electric cars here.

Used BMW 420 by body type

Used BMW 420 by region

Used BMW 420 by fuel

Used BMW 420 by transmission

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