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718vs911Petrol
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  • Specs718 · 911

Porsche 718 Spyder vs Porsche 911 Carrera Cabriolet 991.2: 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 · 2020 vs 2017 · 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 718 Spyder

3,776 €per year

11,6 L/100 km weighted · 25.17 € per 100 km · 1 740 L per year

Gap436 € per yearin favour of the 911 Carrera Cabriolet (−12 %)≈ 201 L petrol 95
BPorsche 911 Carrera Cabriolet 991.2

3,340 €per year

10,3 L/100 km weighted · 22.26 € per 100 km · 1 539 L per year

The verdict changes with your usage
ProfileSplitAA · 718BB · 911Gap
City70 / 25 / 570 % city · 25 % road · 5 % motorway4,218 €3,650 €568 € · 911
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,776 €3,340 €436 € · 911
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,432 €3,030 €402 € · 911

Cumulative saving for the 911 Carrera Cabriolet

1 year
436 €
3 years
1,308 €
5 years
2,180 €
10 years
4,360 €

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

What produces these figures

WLTP combined
11.1 L/100 km · 10.2 L/100 km
Powertrain
Combustion · Combustion
Power
420 ch · 375 ch
Kerb weight
1,454 kg · 1,500 kg

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Frequently asked questions

On a 100 km mixed trip, the Porsche 911 Carrera Cabriolet is about 10% cheaper than the Porsche 718 Spyder with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

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