PorschePetrol
Cayman GT4
385 ch · 2016
Trip mapped at a glance. Charging stops visible, total duration predictable. Caralogy simulation at 130 km/h.
| Measure | Cayman GT4 | Z4 M40i G29 | Gap |
|---|---|---|---|
| Total time | 7h36 | 7h06 | 30 min · Z4 M40i G29 |
| Charging stops | 7 stops | 1 stop | 6 stops · Z4 M40i G29 |
| Cost of energy used | 210.13 € | 105.95 € | 104.18 € · Z4 M40i G29 |
Both vehicles drove at 130 km/h for the entire trip. The gap is built at the stops: 1 stop of 5 min for the Z4 M40i G29 versus 7 stops totalling 35 min for the Cayman GT4.
The official WLTP figures (11,9 L/100km for Cayman GT4 and 7,4 L/100km for Z4 M40i G29) are measured on a mixed cycle averaging ~46 km/h. At a steady 130 km/h, aerodynamic drag weighs much more heavily - it grows with the square of speed. Caralogy calculates a motorway consumption specific to each vehicle based on its aerodynamic profile (SCx), weight and power curve - not a uniform correction factor. For this trip, the simulation yields 12,5 L/100km (Cayman GT4) and 6,3 L/100km (Z4 M40i G29). Full methodology: see the assumptions below the controls.
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Auxerre, A6 | fuel · 2.17 €/L | 103 km | 13 L consumed | 0.270 €/km | 27.85 € |
| Auxerre, A6 → Beaune, A6 | fuel · 2.17 €/L | 103 km | 13 L consumed | 0.270 €/km | 27.85 € |
| Beaune, A6 → Tournus, A6 | fuel · 2.17 €/L | 103 km | 13 L consumed | 0.270 €/km | 27.85 € |
| Tournus, A6 → Limonest, A6 | fuel · 2.17 €/L | 103 km | 13 L consumed | 0.270 €/km | 27.85 € |
| Limonest, A6 → Valence, A7 | fuel · 2.17 €/L | 103 km | 13 L consumed | 0.270 €/km | 27.85 € |
| Valence, A7 → Montélimar, A7 | fuel · 2.17 €/L | 103 km | 13 L consumed | 0.270 €/km | 27.85 € |
| Montélimar, A7 → Manosque, A51 | fuel · 2.17 €/L | 103 km | 13 L consumed | 0.270 €/km | 27.85 € |
| Manosque, A51 → Marseille | fuel · 2.17 €/L | 56 km | 7 L consumed | 0.271 €/km | 15.19 € |
| Trip total | 210.13 € |
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Aix-en-Provence, A7 | fuel · 2.17 €/L | 743 km | 47 L consumed | 0.137 €/km | 101.56 € |
| Aix-en-Provence, A7 → Marseille | fuel · 2.17 €/L | 32 km | 2 L consumed | 0.137 €/km | 4.39 € |
| Trip total | 105.95 € |
Replace one of the two with an alternative from the same segment
385 ch · 2016
340 ch · 2018
On Paris → Marseille (775 km at 130 km/h), the Z4 M40i G29 arrives in 7h06 with 1 fuel stop.
WLTP consumption does not reflect motorway reality. Aerodynamic drag grows with the square of speed, so real consumption is 15 to 25 % higher than WLTP combined. Caralogy calculates a highway consumption specific to each vehicle based on its aerodynamic profile (SCx), weight and power curve.
Total time = driving time + charging time. Driving time is calculated at an average speed of 130 km/h on the motorway (adjustable). Charging time is calculated based on the real power curve of each vehicle, respecting the optimal 10 → 80 % range and the maximum power accepted by the chargers on the route.
No. The displayed cost covers only the energy consumed during the trip: kWh × energy rate, with a mix of home charging and DC fast chargers. Battery wear is a long-term ownership cost, not a trip cost.
On this trip, the energy used costs 210.13 € (Cayman GT4) and 105.95 € (Z4 M40i G29). For reference, an equivalent BMW M340i (~9.5 L/100 km) would cost about 136 € in fuel.