XpengBEV
X9
543 ch · 95 kWh · 2024
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
| X9 | Cayman S PDK 987 | |
|---|---|---|
| Total time | 7h29 | 7h06−23 min |
| Charging stops | 3 stops | 1 stop−2 stops |
| Total cost | 71,55 €−92,33 € | 163,88 € |
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 Cayman S PDK 987 (combustion) makes 1 stop of 5 min, the X9 (electric) 3 stops totalling 28 min. Road safety reminder: on a trip of this duration, it is recommended to stop for at least 51 min total (17 min every 2h). The energy cost is 71,55 € for X9 versus 163,88 € for Cayman S PDK 987.
The official WLTP figures (22,0 kWh/100km for X9 and 10,1 L/100km for Cayman S PDK 987) 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 26,4 kWh/100km (X9) and 10,6 L/100km (Cayman S PDK 987). Full methodology: see the dedicated button above the summary.
On a 200 km round trip (e.g. a weekend getaway), the electric or plug-in hybrid vehicle completes the entire journey on home energy at 0.18 €/kWh - with no charging stop. The time advantage of the combustion car on long-distance motorways disappears entirely, and the economic advantage of electric strengthens considerably.
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 → Tournus, A6initial energy charged at home · 0,21 €/kWh | 324 km86 kWh consumed | 0,055 €/km | 17,95 € |
| Tournus, A6 → Limonest, A6energy charged at Ionity 285 kW · 0,45 €/kWh | 144 km38 kWh consumed | 0,119 €/km | 17,10 € |
| Limonest, A6 → Montélimar, A7energy charged at Ionity 285 kW · 0,45 €/kWh | 144 km38 kWh consumed | 0,119 €/km | 17,10 € |
| Montélimar, A7 → Marseilleenergy charged at Ionity 255 kW · 0,45 €/kWh | 163 km43 kWh consumed | 0,119 €/km | 19,39 € |
| Trip total | 71,55 € | ||
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Valence, A7fuel · 1,99 €/L | 542 km58 L consumed | 0,211 €/km | 114,58 € |
| Valence, A7 → Marseillefuel · 1,99 €/L | 233 km25 L consumed | 0,212 €/km | 49,30 € |
| Trip total | 163,88 € | ||
How many kilometres do you recover depending on the time spent at the charger? Comparison at nominal peak power.
| Charging stop duration | Xpeng X9 | Porsche Cayman S PDK 987 |
|---|---|---|
| 5 minutes | ~66 km | - |
| 10 minutes | ~133 km | - |
| 20 minutes | ~265 km | - |
| Full session 10 → 80 % | ~252 km20 min | - |
Replace one of the two with an alternative from the same segment
543 ch · 95 kWh · 2024
324 ch · 2010
The advantage comes from the combo real range + charging speed. On Paris → Marseille (775 km at 130 km/h), the Cayman S PDK 987 arrives in 7h06 with 1 charging 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: 71,55 € (X9) and 163,88 € (Cayman S PDK 987). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.