PorschePetrol
Cayman 981
279 ch · 2014
Trip mapped at a glance. Charging stops visible, total duration predictable. Caralogy simulation at 130 km/h.
| Measure | Cayman 981 | 420i xDrive G22 | Gap |
|---|---|---|---|
| Total time | 7h21 | 7h06 | 15 min · 420i xDrive G22 |
| Charging stops | 4 stops | 1 stop | 3 stops · 420i xDrive G22 |
| Cost of energy used | 472.67 € | 141.80 € | 330.87 € · 420i xDrive G22 |
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 420i xDrive G22 versus 4 stops totalling 20 min for the Cayman 981.
The official WLTP figures (9,7 L/100km for Cayman 981 and 7,5 L/100km for 420i xDrive 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 30,0 L/100km (Cayman 981) and 9,0 L/100km (420i xDrive G22). Full methodology: see the assumptions below the controls.
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Auxerre, A6 | fuel · 2.03 €/L | 192 km | 58 L consumed | 0.610 €/km | 117.05 € |
| Auxerre, A6 → Limonest, A6 | fuel · 2.03 €/L | 192 km | 58 L consumed | 0.610 €/km | 117.05 € |
| Limonest, A6 → Montélimar, A7 | fuel · 2.03 €/L | 192 km | 58 L consumed | 0.610 €/km | 117.05 € |
| Montélimar, A7 → Aix-en-Provence, A7 | fuel · 2.03 €/L | 192 km | 58 L consumed | 0.610 €/km | 117.05 € |
| Aix-en-Provence, A7 → Marseille | fuel · 2.03 €/L | 7 km | 2 L consumed | 0.638 €/km | 4.46 € |
| Trip total | 472.67 € |
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Montélimar, A7 | fuel · 2.03 €/L | 590 km | 53 L consumed | 0.183 €/km | 107.95 € |
| Montélimar, A7 → Marseille | fuel · 2.03 €/L | 185 km | 17 L consumed | 0.183 €/km | 33.85 € |
| Trip total | 141.80 € |
Replace one of the two with an alternative from the same segment
279 ch · 2014
184 ch · 2021
On Paris → Marseille (775 km at 130 km/h), the 420i xDrive G22 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: 472,67 € (Cayman 981) and 141,80 € (420i xDrive G22). An equivalent BMW M340i (~9,5 L/100 km) would cost about 136 € in motorway fuel. Electric costs less in energy but adds charging stops.