BMW 420 Gran Coupé Valuation: 282 used car listings analysed

Market overviewPrices and data for March-2026: There are currently 282 used BMW 420 Gran Coupé (model years 2017 - 2025) available. Prices range from £13,750 to £39,990, with a median price of £33,273. The most common configuration on the market is a combination of coupe, petrol, and automatic, while the most popular trims include M Sport, Sport Line. Market dynamics indicate that a vehicle sells in an average of 46 days, and 64.2% of listings have recently seen a price reduction (with discounts up to £13,191). Additionally, 38 vehicles are currently listed below market value. An indicator of durability: the inventory includes models with a mileage of up to 73,000 km (Source: 42 scanned sites).

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How much does the BMW 420 Gran Coupé depreciate?

Used BMW 420 Gran Coupé

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


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


Depreciation is an important part of calculating the total cost of owning a BMW 420 Gran Coupé. In addition to the monthly depreciation of £397, 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 Gran Coupé cost? Prices, ratings and depreciation by model year

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

Model year

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

2025 BMW 420 Gran Coupé

£34,948 - £41,900£38,0706,400 miles-£4,760127

2024 BMW 420 Gran Coupé

£31,790 - £37,500£34,40912,200 miles-£4,38014

2023 BMW 420 Gran Coupé

£27,499 - £33,799£30,45821,000 miles-£4,04031

2022 BMW 420 Gran Coupé

£26,000 - £31,990£28,62126,600 miles-£1,62047

2021 BMW 420 Gran Coupé

£17,242 - £31,000£25,61635,600 miles-< 10

2020 BMW 420 Gran Coupé

£16,100 - £22,961£19,25638,100 miles-£1,16013

2019 BMW 420 Gran Coupé

£12,995 - £20,500£17,51547,100 miles-£20015

2017 BMW 420 Gran Coupé

£8,994 - £18,990£14,74065,800 miles-10

2018 BMW 420 Gran Coupé

£10,490 - £18,750£14,61057,500 miles-£2,92014

2016 BMW 420 Gran Coupé

£8,781 - £13,995£11,05386,000 miles-< 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

Comparison of BMW 420 Gran Coupé variants and prices

Below you can compare prices and depreciation for the 2 most popular BMW 420 Gran Coupé variants. The table is updated daily with data from the market in United Kingdom.

Comparison of BMW 420 Gran Coupé variants and prices

Variant

Price range*

Avg. Price

Median Mileage

Depreciation
(12 mth.)

Cars for sale

🏆 The most popular

BMW 420 Gran Coupé M Sport

£14,811 - £39,995£31,18213,200 miles+£3,740275
💰 The budget choice

BMW 420 Gran Coupé Sport Line

£9,390 - £15,500£13,27681,000 miles-< 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

Which variant should you choose?

💰 The budget choice

The Sport Line is the cheapest entry point with an average price of £13,276.

Accuracy will improve as more cars from this variant become available

🏆 The most popular

There are the most M Sport for sale right now (275), 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 (+£3,740).

BMW 420 Gran Coupé (model year 2025) - Price development for the last 10 months and price projection for the next 6 months (May 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 - May
£42,920
£41,380£44,460
Estimate
2025 - June
£42,540
£40,900£44,200
Estimate
2025 - July
£41,900
£40,380£43,440
Estimate
2025 - August
£41,180
£39,860£42,520
Estimate
2025 - September
£40,620
£39,260£42,000
Estimate
2025 - October
£39,640
£38,120£41,160
Estimate
2025 - November
£38,700
£37,060£40,360
Estimate
2025 - December
£38,200
£36,460£39,960
Estimate
2026 - January
£38,340
£36,560£40,100
Estimate
2026 - February
£38,160
£36,700£39,620
Estimate
2026 - April
£37,180
--
Forecast
2026 - May
£36,680
--
Forecast
2026 - June
£36,180
--
Forecast
2026 - July
£35,700
--
Forecast
2026 - August
£35,200
--
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

-£4,760

Next 6 months

-£2,960

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Expensive

Looking for a used version of the popular BMW 420 Gran Coupé?

Are you interested in buying a used sports car? The BMW 420 Gran Coupé is a solid choice. AutoUncle present 292 options sourced from numerous dealership websites and online marketplaces.

How much does a used BMW 420 Gran Coupé go for?

The pricing range for a used BMW 420 Gran Coupé model at AutoUncle will start at £14,495 and go up to £40,990.

The used car price for the German car is determined by five primary factors: the year of manufacturing, engine size and performance, the car's fuel consumption, how many miles the car has travelled not to mention the equipment level of the car.

For example, a younger car with fewer miles on the odometer typically costs more. Likewise, models at the premium end with luxurious features or potent engines tend to 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 different equipment levels does the BMW 420 Gran Coupé have?

In order to find the best sale price, it is important that you only compare with the prices of cars with the same engine and trim level. Otherwise, you might make a wrong decision on which car to purchase.

What are the available fuel options for the BMW 420 Gran Coupé?

The most popular fuel type for the BMW 420 Gran Coupé is petrol.

Fuel options for BMW 420 Gran Coupé:

We emphasize the importance of considering your driving habits before opting for a particular fuel type. Do you generally drive in city conditions or on open highways and motorways? What is your average weekly mileage count?

For shorter trips, electric cars, plug-in hybrids and petrol cars are great. For longer commutes, an electric car is often the best choice - especially with charging options 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 may still be relevant in some cases with very long journeys and lack of charging options. Remember that in some places, high-emission diesel engines are not allowed in urban areas.

Are there different body versions of BMW 420 Gran Coupé?

The BMW 420 Gran Coupé is only available in the coupe body type in the UK. 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.

Which cars can be an alternative to the BMW 420 Gran Coupé?

The BMW 420 Gran Coupé is a somewhat popular car within its segment but still it has some competitors.

Well-liked options instead of the BMW 420 Gran Coupé

  • BMW 420
  • Audi TT
  • Mazda MX5

A popular alternative to the BMW 420 Gran Coupé is the BMW 420. Currently there are 1,491 BMW 420 for sale in the UK with an average sales price of £18,198.

Another alternative car is the Audi TT with 949 cars listed for sale featuring an average selling price of £13,199. Another recommended alternative is Mazda MX5 with 556 cars for sale an average price tag of £15,000.

Considering the adoption of an electric car?

If you're in the market for an electric vehicle in the same category as the BMW 420 Gran Coupé, these are some potential options:

Still on the hunt for the right electric car? Explore our entire assortment of electric cars here.

All regions for BMW 420 Gran Coupé

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