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i4BEVvs120dDiesel
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  • Specsi4 · 120d

BMW i4 M50 xDrive G26 vs BMW 120d F40: 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.

saloon · 2024 vs 2021 · 15,000 km/an · Mixed · Diesel 2.38 €/L · Home 0.20 €/kWh · 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
Charging type

Result · yearly energy cost

ABMW i4 M50 xDrive G26

615 €per year

20,5 kWh/100 km weighted · 4.10 € per 100 km · 3 073 kWh per year

Gap1,078 € per yearin favour of the i4 M50 xDrive (−64 %)≈ 454 L diesel
BBMW 120d F40

1,693 €per year

4,8 L/100 km weighted · 11.29 € per 100 km · 713 L per year

The verdict changes with your usage
ProfileSplitAA · i4BB · 120dGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway523 €1,746 €1,223 € · i4
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway615 €1,693 €1,078 € · i4
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway727 €1,650 €923 € · i4

Cumulative saving for the i4 M50 xDrive

1 year
1,078 €
3 years
3,234 €
5 years
5,390 €
10 years
10,780 €

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

What produces these figures

WLTP combined
19.7 kWh/100 km · 4.7 L/100 km
Powertrain
Fully electric · Combustion
Power
544 ch · 190 ch
Kerb weight
2,215 kg · 1,450 kg

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BMWVSAudi

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Frequently asked questions

On a 100 km mixed trip, the BMW i4 M50 xDrive is about 65% cheaper than the BMW 120d with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The declared range of the BMW i4 M50 xDrive is 510 km (WLTP/EPA). In real-world conditions, expect 10-20% less.

The BMW i4 M50 xDrive is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.