PorschePetrol
911 Carrera 4 991.2
375 ch · 2017
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
| 911 Carrera 4 991.2 | Cayman 981 | |
|---|---|---|
| Total time | 7h21 | 7h21 |
| Charging stops | 4 stops | 4 stops |
| Total cost | 132,35 €−340,32 € | 472,67 € |
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: 4 stops totalling 20 min for the 911 Carrera 4 991.2 versus 4 stops totalling 20 min for the Cayman 981.
The official WLTP figures (10,2 L/100km for 911 Carrera 4 991.2 and 9,7 L/100km for Cayman 981) 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 8,4 L/100km (911 Carrera 4 991.2) and 30,0 L/100km (Cayman 981). 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 · 2,03 €/L | 192 km16 L consumed | 0,171 €/km | 32,75 € |
| Auxerre, A6 → Limonest, A6fuel · 2,03 €/L | 192 km16 L consumed | 0,171 €/km | 32,75 € |
| Limonest, A6 → Montélimar, A7fuel · 2,03 €/L | 192 km16 L consumed | 0,171 €/km | 32,75 € |
| Montélimar, A7 → Aix-en-Provence, A7fuel · 2,03 €/L | 192 km16 L consumed | 0,171 €/km | 32,75 € |
| Aix-en-Provence, A7 → Marseillefuel · 2,03 €/L | 8 km1 L consumed | 0,168 €/km | 1,34 € |
| Trip total | 132,35 € | ||
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Auxerre, A6fuel · 2,03 €/L | 192 km58 L consumed | 0,610 €/km | 117,05 € |
| Auxerre, A6 → Limonest, A6fuel · 2,03 €/L | 192 km58 L consumed | 0,610 €/km | 117,05 € |
| Limonest, A6 → Montélimar, A7fuel · 2,03 €/L | 192 km58 L consumed | 0,610 €/km | 117,05 € |
| Montélimar, A7 → Aix-en-Provence, A7fuel · 2,03 €/L | 192 km58 L consumed | 0,610 €/km | 117,05 € |
| Aix-en-Provence, A7 → Marseillefuel · 2,03 €/L | 7 km2 L consumed | 0,638 €/km | 4,46 € |
| Trip total | 472,67 € | ||
Replace one of the two with an alternative from the same segment
375 ch · 2017
279 ch · 2014
On Paris → Marseille (775 km at 130 km/h), the 911 Carrera 4 991.2 arrives in 7h21 with 4 stops.
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: 132,35 € (911 Carrera 4 991.2) and 472,67 € (Cayman 981). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.