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X4vsX3Diesel
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  • SpecsX4 · X3

BMW X4 M40d G02 vs BMW X3 xDrive30d G01: 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.

family SUV · 2021 vs 2018 · 15,000 km/an · Mixed · Diesel 2.38 €/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 X4 M40d G02

2,192 €per year

6,2 L/100 km weighted · 14.61 € per 100 km · 923 L per year

Gap14 € per yearin favour of the X4 M40d (−1 %)≈ 6 L diesel
BBMW X3 xDrive30d G01

2,206 €per year

6,2 L/100 km weighted · 14.71 € per 100 km · 929 L per year

The verdict changes with your usage
ProfileSplitAA · X4BB · X3Gap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,415 €2,356 €Nearly level
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,192 €2,206 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,024 €2,099 €75 € · X4

Cumulative saving for the X4 M40d

1 year
14 €
3 years
43 €
5 years
71 €
10 years
143 €

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

What produces these figures

WLTP combined
5.9 L/100 km · 6.0 L/100 km
Powertrain
Combustion · Combustion
Power
340 ch · 265 ch
Kerb weight
2,020 kg · 1,820 kg

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AudiVSBMW

Q5 Sportback vs X3 xDrive30d

gap 357 €/year

Frequently asked questions

On a 100 km mixed trip, the BMW X4 M40d and BMW X3 xDrive30d have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The BMW X4 M40d is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.