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M550dDieselvs840iPetrol
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  • ConsumptionConsumptionYearly cost
  • SpecsM550d · 840i

BMW M550d xDrive Touring G30 vs BMW 840i G15: 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.

grand tourer · 2018 vs 2020 · 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 M550d xDrive Touring G30

2,416 €per year

6,8 L/100 km weighted · 16.11 € per 100 km · 1 017 L per year

Gap61 € per yearin favour of the M550d xDrive Touring (−2 %)≈ 28 L petrol 95
BBMW 840i G15

2,477 €per year

7,6 L/100 km weighted · 16.51 € per 100 km · 1 141 L per year

The verdict changes with your usage
ProfileSplitAA · M550dBB · 840iGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,591 €2,747 €156 € · M550d
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,416 €2,477 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,281 €2,269 €Nearly level

Cumulative saving for the M550d xDrive Touring

1 year
61 €
3 years
182 €
5 years
303 €
10 years
607 €

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

What produces these figures

WLTP combined
6.6 L/100 km · 7.3 L/100 km
Powertrain
Combustion · Combustion
Power
400 ch · 340 ch
Kerb weight
1,955 kg · 1,710 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW M550d xDrive Touring and BMW 840i have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The BMW M550d xDrive Touring is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.