PorschePetrol
2020 911 Carrera S Cabriolet 992
449 ch · 2019
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
| 2020 911 Carrera S Cabriolet 992 | Z4 M40i G29 | |
|---|---|---|
| Total time | 7h06 | 7h06 |
| Charging stops | 1 stop | 1 stop |
| Total cost | 171,65 € | 97,16 €−74,49 € |
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: 1 stop of 5 min for the 2020 911 Carrera S Cabriolet 992 versus 1 stop of 5 min for the Z4 M40i G29.
The official WLTP figures (10,6 L/100km for 2020 911 Carrera S Cabriolet 992 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 11,1 L/100km (2020 911 Carrera S Cabriolet 992) and 6,3 L/100km (Z4 M40i 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 → Valence, A7fuel · 1,99 €/L | 517 km58 L consumed | 0,222 €/km | 114,58 € |
| Valence, A7 → Marseillefuel · 1,99 €/L | 258 km29 L consumed | 0,221 €/km | 57,08 € |
| Trip total | 171,65 € | ||
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Aix-en-Provence, A7fuel · 1,99 €/L | 743 km47 L consumed | 0,125 €/km | 93,13 € |
| Aix-en-Provence, A7 → Marseillefuel · 1,99 €/L | 32 km2 L consumed | 0,126 €/km | 4,03 € |
| Trip total | 97,16 € | ||
Replace one of the two with an alternative from the same segment
449 ch · 2019
340 ch · 2018
On Paris → Marseille (775 km at 130 km/h), the 2020 911 Carrera S Cabriolet 992 arrives in 7h06 with 1 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: 171,65 € (2020 911 Carrera S Cabriolet 992) and 97,16 € (Z4 M40i 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.