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X3Dieselvs120iPetrol
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  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsX3 · 120i

BMW X3 xDrive30d G01 vs BMW 120i F20LCI: 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 · 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 X3 xDrive30d G01

2,071 €per year

5,8 L/100 km weighted · 13.80 € per 100 km · 872 L per year

Gap7 € per yearin favour of the 120i (−0 %)≈ 3 L diesel
BBMW 120i F20LCI

2,064 €per year

6,3 L/100 km weighted · 13.76 € per 100 km · 951 L per year

The verdict changes with your usage
ProfileSplitAA · X3BB · 120iGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,260 €2,249 €Nearly level
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,071 €2,064 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway1,928 €1,927 €Nearly level

Cumulative saving for the 120i

1 year
7 €
3 years
21 €
5 years
35 €
10 years
70 €

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

What produces these figures

WLTP combined
5.6 L/100 km · 6.1 L/100 km
Powertrain
Combustion · Combustion
Power
286 ch · 184 ch
Kerb weight
1,930 kg · 1,375 kg

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gap 2 134 €/year
AudiVSBMW

A3 Sedan vs 120i

gap 279 €/year

Frequently asked questions

On a 100 km mixed trip, the BMW X3 xDrive30d and BMW 120i have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The BMW 120i is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.