PorschePetrol
911 Targa 4 991.1
355 ch · 2014
Trip mapped at a glance. Charging stops visible, total duration predictable. Caralogy simulation at 130 km/h.
| Measure | 911 Targa 4 991.1 | 420d Convertible G22 | Gap |
|---|---|---|---|
| Total time | 7h26 | 7h01 | 25 min · 420d Convertible G22 |
| Charging stops | 5 stops | 0 stops | 5 stops · 420d Convertible G22 |
| Cost of energy used | 185.41 € | 72.32 € | 113.09 € · 420d Convertible G22 |
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 5 stops totalling 25 min for the 911 Targa 4 991.1.
The official WLTP figures (10,5 L/100km for 911 Targa 4 991.1 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 11,0 L/100km (911 Targa 4 991.1) and 4,3 L/100km (420d Convertible G22). Full methodology: see the assumptions below the controls.
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Auxerre, A6 | fuel · 2.17 €/L | 146 km | 16 L consumed | 0.239 €/km | 34.96 € |
| Auxerre, A6 → Tournus, A6 | fuel · 2.17 €/L | 146 km | 16 L consumed | 0.239 €/km | 34.96 € |
| Tournus, A6 → Limonest, A6 | fuel · 2.17 €/L | 146 km | 16 L consumed | 0.239 €/km | 34.96 € |
| Limonest, A6 → Montélimar, A7 | fuel · 2.17 €/L | 146 km | 16 L consumed | 0.239 €/km | 34.96 € |
| Montélimar, A7 → Aix-en-Provence, A7 | fuel · 2.17 €/L | 146 km | 16 L consumed | 0.239 €/km | 34.96 € |
| Aix-en-Provence, A7 → Marseille | fuel · 2.17 €/L | 44 km | 5 L consumed | 0.241 €/km | 10.62 € |
| Trip total | 185.41 € |
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Marseille | fuel · 2.17 €/L | 775 km | 33 L consumed | 0.093 €/km | 72.32 € |
| Trip total | 72.32 € |
Replace one of the two with an alternative from the same segment
355 ch · 2014
190 ch · 2021
On Paris → Marseille (775 km at 130 km/h), the 420d Convertible G22 arrives in 7h01 with 0 fuel 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.
On this trip, the energy used costs 185.41 € (911 Targa 4 991.1) and 72.32 € (420d Convertible G22). For reference, an equivalent BMW M340i (~9.5 L/100 km) would cost about 136 € in fuel.