BMWPetrol
M8 Competition Convertible F92
625 ch · 2021
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
| M8 Competition Convertible F92 | P7 | |
|---|---|---|
| Total time | 7h06−75 min | 8h21 |
| Charging stops | 1 stop−2 stops | 3 stops |
| Cost of energy used | 129.20 € | 68.98 €−60.22 € |
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 M8 Competition Convertible F92 (combustion) makes 1 stop of 5 min, the P7 (electric) 3 stops totalling 80 min. Road safety reminder: on a trip of this duration, it is recommended to stop for at least 68 min total (17 min every 2h). The energy cost is 129,20 € for M8 Competition Convertible F92 versus 68,98 € for P7.
The official WLTP figures (11,4 L/100km for M8 Competition Convertible F92 and 17,2 kWh/100km for P7) 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 8,2 L/100km (M8 Competition Convertible F92) and 20,6 kWh/100km (P7). Full methodology: see the dedicated button above the summary.
On a 200 km round trip (e.g. a weekend getaway), the electric or plug-in hybrid vehicle completes the entire journey on home energy at 0.18 €/kWh - with no charging stop. The time advantage of the combustion car on long-distance motorways disappears entirely, and the economic advantage of electric strengthens considerably.
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 → Aix-en-Provence, A7fuel · 2,03 €/L | 746 km61 L consumed | 0,167 €/km | 124,42 € |
| Aix-en-Provence, A7 → Marseillefuel · 2,03 €/L | 29 km2 L consumed | 0,165 €/km | 4,78 € |
| Trip total | 129,20 € | ||
| Segment | Distance | €/km | Cost (€) |
|---|---|---|---|
| Paris → Tournus, A6initial energy charged at home · 0,20 €/kWh | 327 km68 kWh consumed | 0,041 €/km | 13,51 € |
| Tournus, A6 → Valence, A7energy charged at Ionity 75 kW · 0,60 €/kWh | 145 km30 kWh consumed | 0,124 €/km | 18,00 € |
| Valence, A7 → Montélimar, A7energy charged at Ionity 75 kW · 0,60 €/kWh | 145 km30 kWh consumed | 0,124 €/km | 18,00 € |
| Montélimar, A7 → Marseilleenergy charged at Ionity 70 kW · 0,60 €/kWh | 157 km32 kWh consumed | 0,124 €/km | 19,48 € |
| Trip total | 68,98 € | ||
How many kilometres do you recover depending on the time spent at the charger? Comparison at nominal peak power.
| Charging stop duration | BMW M8 Competition Convertible F92 | Xpeng P7 |
|---|---|---|
| 5 minutes | - | ~23 km |
| 10 minutes | - | ~45 km |
| 20 minutes | - | ~90 km |
| Full session 10 → 80 % | - | ~254 km61 min |
Replace one of the two with an alternative from the same segment
625 ch · 2021
424 ch · 75 kWh · 2020
The advantage comes from the combo real range + charging speed. On Paris → Marseille (775 km at 130 km/h), the M8 Competition Convertible F92 arrives in 7h06 with 1 charging 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: 129,20 € (M8 Competition Convertible F92) and 68,98 € (P7). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.