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911vsCaymanPetrol
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  • Specs911 · Cayman

Porsche 911 Turbo 991.2 vs Porsche Cayman S: 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 · 2017 vs 2014 · 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

APorsche 911 Turbo 991.2

3,672 €per year

11,3 L/100 km weighted · 24.48 € per 100 km · 1 692 L per year

Gap496 € per yearin favour of the 911 Turbo (−12 %)≈ 229 L petrol 95
BPorsche Cayman S

4,168 €per year

12,8 L/100 km weighted · 27.79 € per 100 km · 1 921 L per year

The verdict changes with your usage
ProfileSplitAA · 911BB · CaymanGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway3,896 €5,528 €1,632 € · 911
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,672 €4,168 €496 € · 911
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,457 €3,353 €104 € · Cayman

Cumulative saving for the 911 Turbo

1 year
496 €
3 years
1,489 €
5 years
2,482 €
10 years
4,964 €

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

What produces these figures

WLTP combined
11.2 L/100 km · 10.3 L/100 km
Powertrain
Combustion · Combustion
Power
547 ch · 330 ch
Kerb weight
1,595 kg · 1,320 kg

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Frequently asked questions

On a 100 km mixed trip, the Porsche 911 Turbo is about 10% cheaper than the Porsche Cayman S with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The Porsche 911 Turbo is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.