BMWBEV
i7 M70 xDrive G70
659 ch · 101.7 kWh · 2023
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
| i7 M70 xDrive G70 | S8 | |
|---|---|---|
| Total time | 7h51 | 7h06−45 min |
| Charging stops | 3 stops | 1 stop−2 stops |
| Total cost | 69,06 €−143,41 € | 212,47 € |
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 S8 (combustion) makes 1 stop of 5 min, the i7 M70 xDrive G70 (electric) 3 stops totalling 50 min. Road safety reminder: on a trip of this duration, it is recommended to stop for at least 51 min total (17 min every 2h). The energy cost is 69,06 € for i7 M70 xDrive G70 versus 212,47 € for S8.
The official WLTP figures (22,5 kWh/100km for i7 M70 xDrive G70 and 11,7 L/100km for S8) 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 26,1 kWh/100km (i7 M70 xDrive G70) and 13,6 L/100km (S8). 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 → Tournus, A6initial energy charged at home · 0,21 €/kWh | 351 km92 kWh consumed | 0,055 €/km | 19,22 € |
| Tournus, A6 → Valence, A7energy charged at Ionity 144 kW · 0,45 €/kWh | 156 km41 kWh consumed | 0,117 €/km | 18,31 € |
| Valence, A7 → Manosque, A51energy charged at Ionity 144 kW · 0,45 €/kWh | 156 km41 kWh consumed | 0,117 €/km | 18,31 € |
| Manosque, A51 → Marseilleenergy charged at Ionity 140 kW · 0,45 €/kWh | 113 km29 kWh consumed | 0,117 €/km | 13,22 € |
| Trip total | 69,06 € | ||
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Valence, A7fuel · 2,02 €/L | 544 km74 L consumed | 0,274 €/km | 149,08 € |
| Valence, A7 → Marseillefuel · 2,02 €/L | 231 km31 L consumed | 0,274 €/km | 63,39 € |
| Trip total | 212,47 € | ||
How many kilometres do you recover depending on the time spent at the charger? Comparison at nominal peak power.
| Charging stop duration | BMW i7 M70 xDrive G70 | Audi S8 |
|---|---|---|
| 5 minutes | — | — |
| 10 minutes | — | — |
| 20 minutes | — | — |
| Full session 10 → 80 % | — | — |
Replace one of the two with an alternative from the same segment
659 ch · 101.7 kWh · 2023
571 ch · 2025
The advantage comes from the combo real range + charging speed. On Paris → Marseille (775 km at 130 km/h), the S8 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: 69,06 € (i7 M70 xDrive G70) and 212,47 € (S8). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.