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  • SpecsRoma · 911

Ferrari Roma vs Porsche 911 Turbo Cabriolet 991.1: 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 2015 · 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

AFerrari Roma

3,606 €per year

11,1 L/100 km weighted · 24.04 € per 100 km · 1 662 L per year

Gap278 € per yearin favour of the Roma (−7 %)≈ 128 L petrol 95
BPorsche 911 Turbo Cabriolet 991.1

3,883 €per year

11,9 L/100 km weighted · 25.89 € per 100 km · 1 790 L per year

The verdict changes with your usage
ProfileSplitAA · RomaBB · 911Gap
City70 / 25 / 570 % city · 25 % road · 5 % motorway4,028 €4,238 €210 € · Roma
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway3,606 €3,883 €278 € · Roma
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,278 €3,545 €267 € · Roma

Cumulative saving for the Roma

1 year
278 €
3 years
833 €
5 years
1,388 €
10 years
2,777 €

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

What produces these figures

WLTP combined
10.6 L/100 km · 11.8 L/100 km
Powertrain
Combustion · Combustion
Power
620 ch · 520 ch
Kerb weight
1,472 kg · 1,665 kg

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Frequently asked questions

On a 100 km mixed trip, the Ferrari Roma and Porsche 911 Turbo Cabriolet have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.

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