PorschePetrol
Cayman GT4 981
385 ch · 2016
Motorway range comparison
Trip mapped at a glance. Charging stops visible, total duration predictable. Caralogy simulation at 130 km/h.
Paris → Marseille · 130 km/h · Caralogy simulation
| Cayman GT4 981 | Z4 sDrive30i G29 | |
|---|---|---|
| Total time | 7h36 | 7h01−35 min |
| Charging stops | 7 stops | 0 stops−7 stops |
| Total cost | 192,70 € | 81,74 €−110,96 € |
Both vehicles drive at 130 km/h. The difference comes from charging stops.
Analysis
Both vehicles drove at 130 km/h for the entire trip. The gap is built at the stops: no stop for the Z4 sDrive30i G29 versus 7 stops totalling 35 min for the Cayman GT4 981.
The official WLTP figures (11,9 L/100km for Cayman GT4 981 and 6,1 L/100km for Z4 sDrive30i 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 981) and 5,3 L/100km (Z4 sDrive30i G29). Full methodology: see the dedicated button above the summary.
The cost per kilometre depends on the electricity rate applied to each segment — based on the energy source used at that point of the trip.
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Auxerre, A6fuel · 1,99 €/L | 103 km13 L consumed | 0,248 €/km | 25,54 € |
| Auxerre, A6 → Beaune, A6fuel · 1,99 €/L | 103 km13 L consumed | 0,248 €/km | 25,54 € |
| Beaune, A6 → Tournus, A6fuel · 1,99 €/L | 103 km13 L consumed | 0,248 €/km | 25,54 € |
| Tournus, A6 → Limonest, A6fuel · 1,99 €/L | 103 km13 L consumed | 0,248 €/km | 25,54 € |
| Limonest, A6 → Valence, A7fuel · 1,99 €/L | 103 km13 L consumed | 0,248 €/km | 25,54 € |
| Valence, A7 → Montélimar, A7fuel · 1,99 €/L | 103 km13 L consumed | 0,248 €/km | 25,54 € |
| Montélimar, A7 → Manosque, A51fuel · 1,99 €/L | 103 km13 L consumed | 0,248 €/km | 25,54 € |
| Manosque, A51 → Marseillefuel · 1,99 €/L | 56 km7 L consumed | 0,249 €/km | 13,93 € |
| Trip total | 192,70 € | ||
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Marseillefuel · 1,99 €/L | 775 km41 L consumed | 0,105 €/km | 81,74 € |
| Trip total | 81,74 € | ||
Replace one of the two with an alternative from the same segment
385 ch · 2016
258 ch · 2018
On Paris → Marseille (775 km at 130 km/h), the Z4 sDrive30i G29 arrives in 7h01 with 0 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.
Electric: 192,70 € (Cayman GT4 981) and 81,74 € (Z4 sDrive30i G29). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.