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CaymanvsZ4Petrol
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  • SpecsCayman · Z4

Porsche Cayman (Manual) 987 vs BMW Z4 sDrive30i G29: 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 2018 · 15,000 km/an · Mixed · Petrol 95 2.03 €/L · Methodology

Result · yearly energy cost

APorsche Cayman (Manual) 987

3,931 €per year

12,9 L/100 km weighted · 26.20 € per 100 km · 1 933 L per year

Gap2,000 €per year in favour of the Z4 sDrive30i (−51 %)≈ 984 L petrol 95
BBMW Z4 sDrive30i G29

1,930 €per year

6,3 L/100 km weighted · 12.87 € per 100 km · 950 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
ProfileSplitCaymanZ4Gap
City70 % city · 25 % road · 5 % motorway5,013 €2,126 €2,887 € · Z4
Mixed30 % city · 50 % road · 20 % motorway3,931 €1,930 €2,000 € · Z4
Long-distance10 % city · 40 % road · 50 % motorway3,279 €1,778 €1,501 € · Z4

Cumulative saving for the Z4 sDrive30i

1 year
2,000 €
3 years
6,001 €
5 years
10,001 €
10 years
20,002 €

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

What produces these figures

WLTP combined
10.7 L/100 km · 6.1 L/100 km
Powertrain
Combustion · Combustion
Power
269 ch · 258 ch
Kerb weight
1,330 kg · 1,415 kg

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Frequently asked questions

On a 100 km mixed trip, the BMW Z4 sDrive30i is about 50% cheaper than the Porsche Cayman (Manual) with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The BMW Z4 sDrive30i is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.