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M140ivs120iPetrol
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  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • SpecsM140i · 120i

BMW M140i xDrive F20LCI vs BMW 120i 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.

compact · 2018 vs 2020 · 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 M140i xDrive F20LCI

2,731 €per year

8,4 L/100 km weighted · 18.21 € per 100 km · 1 258 L per year

Gap771 € per yearin favour of the 120i (−28 %)≈ 355 L petrol 95
BBMW 120i F40

1,960 €per year

6,0 L/100 km weighted · 13.06 € per 100 km · 903 L per year

The verdict changes with your usage
ProfileSplitAA · M140iBB · 120iGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway3,063 €2,150 €913 € · 120i
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,731 €1,960 €771 € · 120i
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,477 €1,813 €664 € · 120i

Cumulative saving for the 120i

1 year
771 €
3 years
2,314 €
5 years
3,857 €
10 years
7,714 €

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

What produces these figures

WLTP combined
8.0 L/100 km · 5.8 L/100 km
Powertrain
Combustion · Combustion
Power
340 ch · 178 ch
Kerb weight
1,540 kg · 1,390 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW 120i is about 30% cheaper than the BMW M140i xDrive with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

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.