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BMW 420 used • 1,762 cars price-checked by AutoUncle

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How much does the BMW 420 depreciate?

Used BMW 420

A used BMW 420 (2025) model gains about £397 per month in value.


Factors that affect the appreciation of a BMW 420:
- Mileage
- Age of the vehicle
- Number of previous owners
- Accidents or damage history
- Trim level, equipment, and options


Appreciation is an important part of calculating the total value of owning a BMW 420. In addition to the monthly appreciation of £397, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly value.

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

Typical price range*

Average price

Price trend / depreciation
(last 12 months)

Cars for sale

2025 BMW 420

£27,400 - £52,500£43,294+£4,760238

2024 BMW 420

£33,998 - £51,755£42,540-£2,02070

2023 BMW 420

£27,800 - £38,500£32,350-£3,52071

2022 BMW 420

£24,290 - £34,495£29,619-£2,220208

2021 BMW 420

£16,841 - £31,750£26,840-£1,460191

2020 BMW 420

£11,495 - £25,995£17,945-£3,120113

2019 BMW 420

£13,490 - £20,850£16,940-£1,220151

2018 BMW 420

£10,990 - £18,950£15,117-£1,060204

2017 BMW 420

£8,950 - £17,499£13,523-£880176

2016 BMW 420

£6,500 - £15,995£11,887-£1,180130

2015 BMW 420

£7,853 - £13,750£10,498-£680119

2014 BMW 420

£6,495 - £13,250£9,846-£50087

2013 BMW 420

£6,995 - £9,495£8,320-6

*The 'Typical 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

BMW 420 (model year 2025) - Price development for the last 7 months and price projection for the next 6 months (March 2025 - March 2026)

Monthly price data with average prices and price ranges

Month

Average market price

Lowest market price

Highest market price

Calculation method

2025 - March
£39,920
£32,040£47,820
Estimate
2025 - April
£36,000
£27,680£44,320
Estimate
2025 - May
£35,920
£27,160£44,700
Estimate
2025 - June
£42,180
£34,280£50,080
Estimate
2025 - July
£43,720
£38,200£49,240
Estimate
2025 - August
£44,400
£40,160£48,640
Estimate
2025 - September
£44,680
£41,020£48,340
Estimate
2025 - November
£48,140
--
Forecast
2025 - December
£49,880
--
Forecast
2026 - January
£51,600
--
Forecast
2026 - February
£53,340
--
Forecast
2026 - March
£55,080
--
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

£4,760

Next 6 months

£10,400

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Price checked by AutoUncle

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Good price

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A bit pricey

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Are you looking for the best-selling BMW 420 used?

BMW 420 offers outstanding driving comfort and its design has received a number of awards. AutoUncle provides access to 1,572 available options in the UK, each one gathered from an online marketplace or dealership website.

What is the used car price of the BMW 420?

A used BMW 420 costs between £8,980 for the cheapest variant and £44,000 for the most expensive model.

The price for the German car is determined by five main factors: year of production, engine capacity and power, fuel economy of the car, how far the car has already travelled and the equipment level of the car.

For instance, a car that is younger with a lower number on the odometer, or more luxurious models with more potent engines will generally cost more than a car from an older model year, with higher mileage and no optional extras.

Which trim levels can I choose for the BMW 420?

The most popular equipment variants for the BMW 420 are:

When reviewing the price points of used BMW 420 cars, it is important only comparing the prices of cars with the same engine and trim level. If you don't, you might come to a wrong decision on which car to acquire.

Which fuel types does the BMW 420 come with?

The principal fuel kind for a BMW 420 is diesel.

BMW 420 fuel types compared:

  • BMW 420 diesel: 784 cars currently available with an average price of £15,367
  • BMW 420 petrol: 766 cars currently available with an average price of £26,524
  • BMW 420 hybrid: Currently there is 22 cars available on AutoUncle with an average price of £27,946

We highly recommend thinking about your driving habits before deciding between the different fuel types. Do you primarily use your car to commute, and is the distance 35 miles or fewer each way?

If your trips are mostly short, electric, plug-in hybrid or petrol may make the most sense. For daily long-distance driving, the electric car is often ideal - especially with a charger at home or at work. For longer daily commutes, a modern electric car is often suitable - especially if you can charge at home or at work. Diesel cars can still make sense if you drive very far and don't have access to charging. Consider that in many countries, cities have banned the entry of diesel engines with high emissions.

Will the BMW 420 come in different body types?

The BMW 420 comes in various body types, coupe being the most popular. 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.

AutoUncle's selection of BMW 420 by body type, price and quantity for sale

  • BMW 420 coupe: 1,099 cars - average price £20,830
  • BMW 420 cabriolet: 266 cars - average price £24,596
  • BMW 420 hatchback](https://www.autouncle.co.uk/en-gb/used-cars/BMW/420/b-hatchback): 191 cars - average price £16,859
  • BMW 420 sedan: 3 cars - average price £15,665

What other cars are similar to BMW 420?

Although the BMW 420 is among the most popular cars in its segment it has some competitors.

Favored alternatives for the BMW 420

  • Audi TT
  • Mazda MX5
  • BMW Z4

The Audi TT is a strong alternative to the BMW 420. You'll currently find an inventory of 918 of these cars available for sale on AutoUncle, with an average sale price of £918.

The Mazda MX5 is a strong option in this segment, with 538 cars currently for sale on AutoUncle and an average price of £14,000. Another good choice for an alternative car is the BMW Z4 with 482 cars for sale for the average price of £12,995.

In pursuit of a more sustainable counterpart to the BMW 420?

Not fixed on the BMW 420? Here are some electric options in the same segment::

Haven't discovered an electric car that suits your preferences? Examine our full lineup of electric cars here.

All body types for BMW 420

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All trim level for BMW 420