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M340ivs540iPetrol
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  • SpecsM340i · 540i

BMW M340i xDrive G20 vs BMW 540i xDrive G30: 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 · 2019 vs 2018 · 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 M340i xDrive G20

2,539 €per year

7,8 L/100 km weighted · 16.93 € per 100 km · 1 170 L per year

Gap169 € per yearin favour of the M340i xDrive (−6 %)≈ 78 L petrol 95
BBMW 540i xDrive G30

2,708 €per year

8,3 L/100 km weighted · 18.05 € per 100 km · 1 248 L per year

The verdict changes with your usage
ProfileSplitAA · M340iBB · 540iGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,889 €3,094 €205 € · M340i
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,539 €2,708 €169 € · M340i
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,269 €2,405 €137 € · M340i

Cumulative saving for the M340i xDrive

1 year
169 €
3 years
508 €
5 years
846 €
10 years
1,693 €

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

What produces these figures

WLTP combined
7.4 L/100 km · 7.9 L/100 km
Powertrain
Combustion · Combustion
Power
374 ch · 340 ch
Kerb weight
1,670 kg · 1,660 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW M340i xDrive and BMW 540i xDrive have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The BMW M340i xDrive is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.