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911vsBoxsterPetrol
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  • Specs911 · Boxster

Porsche 911 Turbo 991.1 vs Porsche Boxster 981: which one uses less fuel?

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

sports car · 2011 vs 2012 · 15,000 km/an · Mixed · Petrol 95 2.03 €/L · Methodology

Result · yearly energy cost

APorsche 911 Turbo 991.1

4,018 €per year

13,2 L/100 km weighted · 26.78 € per 100 km · 1 976 L per year

Gap117 €per year in favour of the Boxster (−3 %)≈ 57 L petrol 95
BPorsche Boxster 981

3,901 €per year

12,8 L/100 km weighted · 26.01 € per 100 km · 1 919 L per year

Annual mileage
15,000 km
5,000 km50,000 km
Driving mix
Fuel price : Petrol 95 2.03 €/L · Diesel 2.25 €/Lprix-carburants.gouv.fr — moyenne nationale du 25/08/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement
The verdict changes with your usage
ProfileSplit911BoxsterGap
City70 % city · 25 % road · 5 % motorway4,530 €5,004 €474 € · 911
Mixed30 % city · 50 % road · 20 % motorway4,018 €3,901 €Nearly level
Long-distance10 % city · 40 % road · 50 % motorway3,633 €3,213 €420 € · Boxster

Cumulative saving for the Boxster

1 year
117 €
3 years
350 €
5 years
583 €
10 years
1,167 €

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

What produces these figures

WLTP combined
12.5 L/100 km · 10.7 L/100 km
Powertrain
Combustion · Combustion
Power
507 ch · 259 ch
Kerb weight
1,570 kg · 1,335 kg

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Frequently asked questions

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

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