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  • SpecsM235i · Boxster

BMW M235i xDrive Gran Coupe F44 vs Porsche Boxster: 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.

compact · 2021 vs 2013 · 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

ABMW M235i xDrive Gran Coupe F44

2,272 €per year

7,0 L/100 km weighted · 15.15 € per 100 km · 1 047 L per year

Gap1,786 € per yearin favour of the M235i xDrive Gran Coupe (−44 %)≈ 823 L petrol 95
BPorsche Boxster

4,058 €per year

12,5 L/100 km weighted · 27.06 € per 100 km · 1 870 L per year

The verdict changes with your usage
ProfileSplitAA · M235iBB · BoxsterGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway2,488 €5,482 €2,994 € · M235i
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway2,272 €4,058 €1,786 € · M235i
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway2,112 €3,203 €1,091 € · M235i

Cumulative saving for the M235i xDrive Gran Coupe

1 year
1,786 €
3 years
5,359 €
5 years
8,932 €
10 years
17,864 €

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

What produces these figures

WLTP combined
6.7 L/100 km · 9.8 L/100 km
Powertrain
Combustion · Combustion
Power
306 ch · 269 ch
Kerb weight
1,570 kg · 1,310 kg

Other similar comparisons

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S3 Sedan vs M235i xDrive Gran Coupe

gap 582 €/year
PorscheVSBMW

Boxster vs Z4 sDrive30i

gap 2 664 €/year
AudiVSBMW

S3 Sportback vs M235i xDrive Gran Coupe

gap 635 €/year
PorscheVSBMW

Boxster vs Z4 sDrive30i

gap 2 699 €/year

Frequently asked questions

On a 100 km mixed trip, the BMW M235i xDrive Gran Coupe is about 45% cheaper than the Porsche Boxster with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The BMW M235i xDrive Gran Coupe is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.