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M5vsM240iPetrol
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  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsM5 · M240i

BMW M5 CS F90 vs BMW M240i Convertible F44: which is cheaper to run?

What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.

grand tourer · 2021 vs 2021 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Methodology
Annual mileage
15,000 km
5,000 km50,000 km
Driving mix

30 % City · 50 % Road · 20 % Motorway

Fuel price
Petrol 95 2.17 €/L · Diesel 2.38 €/Lprix-carburants.gouv.fr — moyenne nationale du 05/10/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement

Result · yearly energy cost

ABMW M5 CS F90

3,987 €per year

12,3 L/100 km weighted · 26.58 € per 100 km · 1 838 L per year

Gap1,406 € per yearin favour of the M240i Convertible (−35 %)≈ 648 L petrol 95
BBMW M240i Convertible F44

2,581 €per year

7,9 L/100 km weighted · 17.21 € per 100 km · 1 190 L per year

The verdict changes with your usage
ProfileSplitAA · M5BB · M240iGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway4,834 €2,944 €1,890 € · M240i
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,987 €2,581 €1,406 € · M240i
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,330 €2,305 €1,025 € · M240i

Cumulative saving for the M240i Convertible

1 year
1,406 €
3 years
4,218 €
5 years
7,031 €
10 years
14,062 €

Energy only. Excludes purchase, insurance, servicing, depreciation.

What produces these figures

WLTP combined
11.3 L/100 km · 7.5 L/100 km
Powertrain
Combustion · Combustion
Power
635 ch · 340 ch
Kerb weight
1,825 kg · 1,660 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW M240i Convertible is about 35% cheaper than the BMW M5 CS with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The BMW M240i Convertible is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.