PorschePetrol
911 Targa 4S 991.2
426 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 Targa 4S 991.2 | 420d Convertible G22 | |
|---|---|---|
| Total time | 7h21 | 7h01−20 min |
| Charging stops | 4 stops | 0 stops−4 stops |
| Total cost | 129,55 € | 66,32 €−63,23 € |
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 420d Convertible G22 versus 4 stops totalling 20 min for the 911 Targa 4S 991.2.
The official WLTP figures (10,7 L/100km for 911 Targa 4S 991.2 and 4,5 L/100km for 420d Convertible G22) 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 Targa 4S 991.2) and 4,3 L/100km (420d Convertible G22). 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 | 192 km16 L consumed | 0,167 €/km | 32,06 € |
| Auxerre, A6 → Limonest, A6fuel · 1,99 €/L | 192 km16 L consumed | 0,167 €/km | 32,06 € |
| Limonest, A6 → Montélimar, A7fuel · 1,99 €/L | 192 km16 L consumed | 0,167 €/km | 32,06 € |
| Montélimar, A7 → Aix-en-Provence, A7fuel · 1,99 €/L | 192 km16 L consumed | 0,167 €/km | 32,06 € |
| Aix-en-Provence, A7 → Marseillefuel · 1,99 €/L | 8 km1 L consumed | 0,164 €/km | 1,31 € |
| Trip total | 129,55 € | ||
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Marseillefuel · 1,99 €/L | 775 km33 L consumed | 0,086 €/km | 66,32 € |
| Trip total | 66,32 € | ||
Replace one of the two with an alternative from the same segment
426 ch · 2017
190 ch · 2021
On Paris → Marseille (775 km at 130 km/h), the 420d Convertible G22 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: 129,55 € (911 Targa 4S 991.2) and 66,32 € (420d Convertible G22). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.