BMW 840 Valuation: 221 used car listings analysed

Market overviewPrices and data for March-2026: There are currently 221 used BMW 840 (model years 2018 - 2025) available. Prices range from £26,750 to £57,950, with a median price of £36,990. The most common configuration on the market is a combination of coupe, petrol, and automatic, while the most popular trims include M Sport, Comfort Edition, Sport Line. Market dynamics indicate that a vehicle sells in an average of 38 days, and 60.4% of listings have recently seen a price reduction (with discounts up to £24,482). Additionally, 38 vehicles are currently listed below market value. An indicator of durability: the inventory includes models with a mileage of up to 79,355 km (Source: 42 scanned sites).

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How much does the BMW 840 depreciate?

Used BMW 840

A used BMW 840 (2020) model loses about £170 per month in value.


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.

How much does a used BMW 840 cost? Prices, ratings and depreciation by model year

How much does a used BMW 840 cost? Prices, ratings and depreciation by model year

Model year

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

2025 BMW 840

£36,437 - £69,995£54,9444,300 miles-£21,88029

2024 BMW 840

£42,990 - £57,950£47,39912,700 miles-< 10

2023 BMW 840

£34,950 - £47,498£42,02325,200 miles-£3,98035

2022 BMW 840

£32,500 - £43,298£38,70621,700 miles-£1,72042

2021 BMW 840

£27,777 - £38,785£33,89934,600 miles-£1,98030

2020 BMW 840

£26,995 - £37,500£31,65944,200 miles-£2,04041

2019 BMW 840

£25,489 - £37,950£30,82244,700 miles-£20024

2018 BMW 840

£24,497 - £29,995£27,13579,400 miles-£1,18010

*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

Comparison of BMW 840 variants and prices

Below you can compare prices and depreciation for the 2 most popular BMW 840 variants. The table is updated daily with data from the market in United Kingdom.

Comparison of BMW 840 variants and prices

Variant

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

🏆 The most popular

BMW 840 M Sport

£29,490 - £62,500£42,91921,400 miles-£1,780127
💰 The budget choice

BMW 840 Comfort Edition

£26,750 - £38,280£32,39943,400 miles-£2,14072

*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

Which variant should you choose?

💰 The budget choice

The Comfort Edition is the cheapest entry point with an average price of £32,399.

🏆 The most popular

There are the most M Sport for sale right now (127), which gives you the most options to choose from.

📈 The best value

The M Sport has held its price stable with minimal loss in value over the past year (-£1,780).

BMW 840 (model year 2020) - Price development for the last 12 months and price projection for the next 6 months (March 2025 - August 2026)

Monthly price data with average prices and price ranges

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

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Interested in finding a great deal on the popular BMW 840?

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.

What is the cost of a pre-owned BMW 840?

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.

How many different equipment levels does the BMW 840 have?

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.

What fuel types are available for the BMW 840?

For the BMW 840, petrol is the most favored fuel.

Available fuel options for BMW 840:

  • BMW 840 petrol: 162 cars currently available with an average price of £39,764
  • BMW 840 diesel: 46 cars currently available with an average price of £31,632
  • BMW 840 plug-in hybrid: 1 car currently available on AutoUncle with an average price of £29,989

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.

In which different body variants are the BMW 840 available?

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.

What are the obvious competitors for the BMW 840?

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

  • BMW 420
  • Audi TT
  • Mazda MX5

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.

Evaluating the option of an electric car?

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.

All regions for BMW 840

All fuel types for BMW 840