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BoxsterPetrolvs225dDiesel
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  • SpecsBoxster · 225d

Porsche Boxster S vs BMW 225d Convertible F22: 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 · 2012 vs 2018 · 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 Boxster S

4,186 €per year

12,9 L/100 km weighted · 27.90 € per 100 km · 1 929 L per year

Gap2,365 € per yearin favour of the 225d Convertible (−56 %)≈ 1,090 L petrol 95
BBMW 225d Convertible F22

1,821 €per year

5,1 L/100 km weighted · 12.14 € per 100 km · 767 L per year

The verdict changes with your usage
ProfileSplitAA · BoxsterBB · 225dGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway5,347 €1,948 €3,399 € · 225d
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway4,186 €1,821 €2,365 € · 225d
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway3,484 €1,718 €1,766 € · 225d

Cumulative saving for the 225d Convertible

1 year
2,365 €
3 years
7,094 €
5 years
11,823 €
10 years
23,645 €

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

What produces these figures

WLTP combined
10.7 L/100 km · 5.0 L/100 km
Powertrain
Combustion · Combustion
Power
314 ch · 224 ch
Kerb weight
1,355 kg · 1,625 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW 225d Convertible is about 55% cheaper than the Porsche Boxster S with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The BMW 225d Convertible is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.