Used (2020) BMW 420 M Sport 190 HP | Good price
- 4 Series Gran Coupe d [190] M
- 2020
- 51,701 miles
- Trim level: M Sport
- 2.0L Diesel
- Coupe
- Automatic
- 190 HP (139 kW)
- mpg: 5.8
- CO2: 151 g CO2/km comb.
- Details
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4 SERIES DIESEL CONVERTIBLE d MHT
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Used BMW 420
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 £73, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly value.
Model year | Price range* | Avg. Price | Depreciation | Cars for sale |
|---|---|---|---|---|
2025 BMW 420 | £24,822 - £49,875 | £38,943 | +£880 | 258 |
2024 BMW 420 | £32,500 - £50,994 | £38,441 | -£3,300 | 48 |
2023 BMW 420 | £27,699 - £34,975 | £31,273 | -£2,640 | 90 |
2022 BMW 420 | £23,440 - £31,950 | £27,904 | -£1,800 | 212 |
2021 BMW 420 | £17,190 - £29,990 | £25,260 | -£1,380 | 153 |
2019 BMW 420 | £12,990 - £20,549 | £16,918 | -£660 | 128 |
2020 BMW 420 | £10,495 - £22,998 | £16,416 | -£3,180 | 115 |
2018 BMW 420 | £10,999 - £17,898 | £14,571 | -£1,180 | 128 |
2017 BMW 420 | £8,795 - £16,993 | £12,858 | -£240 | 121 |
2016 BMW 420 | £6,995 - £15,000 | £11,278 | -£780 | 102 |
2015 BMW 420 | £6,550 - £14,500 | £10,228 | -£640 | 96 |
2014 BMW 420 | £6,494 - £13,990 | £9,608 | -£180 | 74 |
2013 BMW 420 | £5,495 - £14,000 | £8,458 | -£360 | 13 |
*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
Last updated: 10 January 2026
Variant | Price range* | Avg. Price | Depreciation | Cars for sale |
|---|---|---|---|---|
🏆 The most popular BMW 420 M Sport | £8,995 - £43,490 | £23,647 | +£900 | 1,426 |
BMW 420 Comfort Edition | £5,495 - £25,799 | £11,638 | +£160 | 19 |
BMW 420 Sport Line | £5,495 - £16,950 | £10,963 | -£660 | 63 |
💰 The budget choice BMW 420 Luxury Line | £6,995 - £13,800 | £10,781 | -£260 | 20 |
*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
Last updated: 10 January 2026
The Luxury Line is the cheapest entry point with an average price of £10,781.
There are the most M Sport for sale right now (1426), which gives you the most options to choose from.
The M Sport has held its price stable with minimal loss in value over the past year (+£900).
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 | £44,660↗ | £40,980 | £48,340 | Estimate |
| 2025 - October | £43,920↘ | £38,660 | £49,180 | Estimate |
| 2025 - November | £41,260↘ | £35,760 | £46,780 | Estimate |
| 2025 - December | £40,800↘ | £36,220 | £45,400 | Estimate |
| 2026 - February | £39,640↘ | - | - | Forecast |
| 2026 - March | £39,060↘ | - | - | Forecast |
| 2026 - April | £38,480↘ | - | - | Forecast |
| 2026 - May | £37,900↘ | - | - | Forecast |
| 2026 - June | £37,320↘ | - | - | Forecast |
All estimates and forecasts are based on actual market data
Last updated: 10 January 2026
Average Monthly Depreciation
A summary of the past 12 and an estimation of the next 6 months.
Past 12 months
£880
Next 6 months
-£3,480
Price checked by AutoUncle
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BMW 420 offers fantastic driving comfort and its design has received numerous awards. At AutoUncle, we've assembled an impressive collection of 1,733 used BMW 420 cars in the UK gathered from numerous dealership websites and online marketplaces.
A used BMW 420 costs between £8,950 for the cheapest variant and £43,789 for the most expensive model.
The popular BMW 420 is being offered at different prices depending on primarily five factors: manufacturing year, engine size and performance, fuel efficiency of the car, vehicle mileage not to mention the equipment level of the car.
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 a used model with many kilometres on the odometer and in a simple equipment variant.
The BMW 420 presents a wide variety of trim configurations to cater to different driving tastes and requirements. The most popular ones are:
When examining the market value of a used BMW 420, it's imperative to examine vehicles that have the same engines and features. Otherwise, you might draw an inaccurate conclusion about which car to purchase.
The primary energy source for the BMW 420 is petrol.
Compare fuel types for BMW 420:
We advocate for a careful review of your driving habits before you commit to a fuel type. Is your driving mainly in the city or on long stretches of open roads and motorways? What's your typical weekly driving distance?
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. Consider that in many countries, cities have banned the entry of diesel engines with high emissions.
The BMW 420 is available in several body types, but the most popular version is coupe. 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.
While being particularly popular, the German BMW 420 has some competitors.
Alternative cars to the BMW 420
The Audi TT is a strong alternative to the BMW 420. With an average sales price of £13,990 you'll currently discover a substantial selection of 1,042 of these cars available for purchase on AutoUncle.
The Mazda MX5 is a strong option in this segment, with 689 cars currently for sale on AutoUncle and an average price of £14,695. The BMW Z4 comes in as the third most popular choice with an average sales price of £16,950 and 551 car for sale at the moment in the UK.
Considering something greener than the BMW 420? Check out these electric alternatives from the same segment::
Haven't found an electric car that resonates with you? Review our entire selection of electric cars here.