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911PetrolvsCayenneDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs911 · Cayenne

Porsche 911 Carrera 4 GTS 991.2 vs Porsche Cayenne Diesel: 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.

sports car · 2018 vs 2015 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Diesel 2.38 €/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

APorsche 911 Carrera 4 GTS 991.2

3,688 €per year

11,3 L/100 km weighted · 24.59 € per 100 km · 1 700 L per year

Gap31 € per yearin favour of the Cayenne Diesel (−1 %)≈ 14 L petrol 95
BPorsche Cayenne Diesel

3,657 €per year

10,3 L/100 km weighted · 24.38 € per 100 km · 1 539 L per year

The verdict changes with your usage
ProfileSplitAA · 911BB · CayenneGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway4,043 €3,997 €Nearly level
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,688 €3,657 €Nearly level
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,349 €3,318 €Nearly level

Cumulative saving for the Cayenne Diesel

1 year
31 €
3 years
94 €
5 years
156 €
10 years
313 €

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

What produces these figures

WLTP combined
11.2 L/100 km · 10.2 L/100 km
Powertrain
Combustion · Combustion
Power
480 ch · 262 ch
Kerb weight
1,495 kg · 2,110 kg

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Frequently asked questions

On a 100 km mixed trip, the Porsche 911 Carrera 4 GTS and Porsche Cayenne Diesel have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

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