Used (2020) BMW 840 340 HP | Good price
- 8 Series Gran Coupe i sDrive 4dr
- 2020
- 40,975 miles
- 3.0L Petrol
- Coupe
- Automatic
- 340 HP (250 kW)
- CO2 emissions: 195 g CO2/km comb.
- mpg: 8.5
- Details
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Used BMW 840
Factors that affect the depreciation of a BMW 840:
- Mileage driven
- Maintenance
- Service history
Depreciation is an important part of calculating the total cost of owning a BMW 840. In addition to the monthly depreciation of £170, you should also factor in fuel costs, road tax, insurance and maintenance (including tyres and car washes) to get the full monthly cost.
Model year | Price range* | Avg. Price | Median Mileage | Depreciation | Cars for sale |
|---|---|---|---|---|---|
2025 BMW 840 | £36,437 - £69,995 | £54,944 | 4,300 miles | -£21,880 | 29 |
2024 BMW 840 | £42,990 - £57,950 | £47,399 | 12,700 miles | - | < 10 |
2023 BMW 840 | £34,950 - £47,498 | £42,023 | 25,200 miles | -£3,980 | 35 |
2022 BMW 840 | £32,500 - £43,298 | £38,706 | 21,700 miles | -£1,720 | 42 |
2021 BMW 840 | £27,777 - £38,785 | £33,899 | 34,600 miles | -£1,980 | 30 |
2020 BMW 840 | £26,995 - £37,500 | £31,659 | 44,200 miles | -£2,040 | 41 |
2019 BMW 840 | £25,489 - £37,950 | £30,822 | 44,700 miles | -£200 | 24 |
2018 BMW 840 | £24,497 - £29,995 | £27,135 | 79,400 miles | -£1,180 | 10 |
*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: 23 March 2026
Variant | Price range* | Avg. Price | Median Mileage | Depreciation | Cars for sale |
|---|---|---|---|---|---|
🏆 The most popular BMW 840 M Sport | £29,490 - £62,500 | £42,919 | 21,400 miles | -£1,780 | 127 |
💰 The budget choice BMW 840 Comfort Edition | £26,750 - £38,280 | £32,399 | 43,400 miles | -£2,140 | 72 |
*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: 23 March 2026
The Comfort Edition is the cheapest entry point with an average price of £32,399.
There are the most M Sport for sale right now (127), 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 (-£1,780).
Month | Average market price | Lowest market price | Highest market price | Calculation method |
|---|---|---|---|---|
| 2025 - March | £33,620 | £31,640 | £35,600 | Estimate |
| 2025 - April | £33,820↗ | £31,540 | £36,120 | Estimate |
| 2025 - May | £33,680↘ | £31,680 | £35,660 | Estimate |
| 2025 - June | £33,640↘ | £31,680 | £35,600 | Estimate |
| 2025 - July | £32,860↘ | £30,900 | £34,820 | Estimate |
| 2025 - August | £32,720↘ | £30,940 | £34,520 | Estimate |
| 2025 - September | £33,400↗ | £31,320 | £35,480 | Estimate |
| 2025 - October | £32,660↘ | £30,660 | £34,660 | Estimate |
| 2025 - November | £32,160↘ | £30,280 | £34,060 | Estimate |
| 2025 - December | £32,220↗ | £30,360 | £34,060 | Estimate |
| 2026 - January | £32,020↘ | £30,180 | £33,860 | Estimate |
| 2026 - February | £31,580↘ | £29,600 | £33,560 | Estimate |
| 2026 - April | £30,840↘ | - | - | Forecast |
| 2026 - May | £30,480↘ | - | - | Forecast |
| 2026 - June | £30,100↘ | - | - | Forecast |
| 2026 - July | £29,740↘ | - | - | Forecast |
| 2026 - August | £29,380↘ | - | - | Forecast |
All estimates and forecasts are based on actual market data
Last updated: 23 March 2026
Average Monthly Depreciation
A summary of the past 12 and an estimation of the next 6 months.
Past 12 months
-£2,040
Next 6 months
-£2,200
Price checked by AutoUncle
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Looking for the best deal on a used car? Look no further than the BMW 840 - an excellent choice! AutoUncle has 209 used BMW 840 for sale in the UK, each one sourced from an online marketplace or dealership website.
The oldest and cheapest BMW 840 here on AutoUncle can be purchased for £27,989, while a newer model with a more advanced trim costs around £57,500.
The price for a BMW 840 depends on five primary factors: the year of manufacturing, engine size and performance, the car's fuel consumption, how much the car's odometer reads along with equipment.
For instance, a more recent model with limited mileage, or a premium variant featuring a powerful engine, typically commands a higher price than, for example, an older model with more kilometres driven or with a lower equipment level.
When evaluating the costs of pre-owned BMW 840, it is important that you exclusively compare with the prices of cars with the same engine and equipment variant. Otherwise, you might come to a wrong decision on which car to purchase.
For the BMW 840, petrol is the most favored fuel.
Available fuel options for BMW 840:
Keep your driving habits in mind when choosing which fuel type to purchase. Is your driving mainly in the city or on long stretches of open roads and motorways? What's your typical weekly driving distance?
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. If you have a daily commute over longer distances, a modern electric car can be a great choice - especially if you have access to charging at home or at work. For very long daily driving without charging options, a diesel car can still be relevant. Take into account that several countries restrict high-emission diesel engines from their city zones.
The BMW 840 is only available in the coupe body type in the UK. The coupe body style is synonymous with elegance and sporty performance. Its chassis is often more taut and robust compared to a saloon or SUV. Ideal for those without children and favouring light travel, coupés in the UK typically come at a premium compared to their equivalent saloon or hatchback variants.
The BMW 840 is a fairly popular car within its segment but still there are other competing cars to consider.
Competing cars for the BMW 840
The BMW 420 is a top choice when looking for an alternative to the BMW 840. With an average sales price of £18,198 you'll currently discover a substantial selection of 1,491 of these cars available for purchase on AutoUncle.
The Audi TT is another popular car in the segment with a selection of 949 vehicles currently for sale with an average price of £13,199. Ranked third, the Mazda MX5 is also a good alternative to the BMW 840, and you'll find 556 used Mazda MX5 cars for an average price of £15,000 on AutoUncle.
Considering something greener than the BMW 840? Check out these electric alternatives from the same segment::
Not satisfied with the electric car options you've seen? See all our available electric cars here.