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M5vsCayennePetrol
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  • SpecsM5 · Cayenne

BMW M5 CS F90 vs Porsche Cayenne S Coupe E3.1: which one uses less fuel?

Same car, two powertrains. The simulator below calculates the gap based on your mileage and charging type.

grand tourer · 2021 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 M5 CS F90

3,987 €per year

12,3 L/100 km weighted · 26.58 € per 100 km · 1 838 L per year

Gap128 € per yearin favour of the M5 CS (−3 %)≈ 59 L petrol 95
BPorsche Cayenne S Coupe E3.1

4,116 €per year

12,6 L/100 km weighted · 27.44 € per 100 km · 1 897 L per year

The verdict changes with your usage
ProfileSplitAA · M5BB · CayenneGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway4,834 €4,598 €235 € · Cayenne
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,987 €4,116 €128 € · M5
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,330 €3,742 €412 € · M5

Cumulative saving for the M5 CS

1 year
128 €
3 years
385 €
5 years
642 €
10 years
1,284 €

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

What produces these figures

WLTP combined
11.3 L/100 km · 12.1 L/100 km
Powertrain
Combustion · Combustion
Power
635 ch · 420 ch
Kerb weight
1,825 kg · 2,143 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW M5 CS and Porsche Cayenne S Coupe have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

The BMW M5 CS is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.