TeslaBEV
Model X Performance
778 ch · 100 kWh · 2020
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
| Model X Performance | GLC 400 4MATIC X254 | |
|---|---|---|
| Total time | 7h21 | 7h11−10 min |
| Charging stops | 2 stops | 1 stop−1 stop |
| Total cost | 62,36 € | 42,89 €−19,47 € |
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 gap is built at the stops: 1 stop of 10 min for the GLC 400 4MATIC X254 versus 2 stops totalling 20 min for the Model X Performance.
The official WLTP figures (23,6 kWh/100km for Model X Performance and 13,2 kWh/100km for GLC 400 4MATIC X254) 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 21,1 kWh/100km (Model X Performance) and 16,5 kWh/100km (GLC 400 4MATIC X254). Full methodology: see the dedicated button above the summary.
During the 10 minutes of charging for the GLC 400 4MATIC X254, range recovers by 292 km. During the 20 cumulative minutes for the Model X Performance, range recovers by 380 km. Per minute: the GLC 400 4MATIC X254 recovers 1,5× faster. At this rate, the charging stop blends into the trip rhythm - just enough time for a coffee. At a lower rate, it dictates the pace.
A Peugeot 3008 1.2 PureTech 130 (equivalent segment) consumes about 7,8 L/100km on the motorway at 130 km/h. At 1,9 €/L, this Paris → Marseille trip would cost ~112 €. That is 1,8× the electric cost of the Model X Performance and 2,6× that of the GLC 400 4MATIC X254. The gap narrows in winter but never reverses.
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 → Limonest, A6initial energy charged at home · 0,20 €/kWh | 426 km90 kWh consumed | 0,042 €/km | 18,01 € |
| Limonest, A6 → Montélimar, A7energy charged at Supercharger 240 kW · 0,60 €/kWh | 189 km40 kWh consumed | 0,127 €/km | 24,00 € |
| Montélimar, A7 → Marseilleenergy charged at Supercharger 242 kW · 0,60 €/kWh | 160 km34 kWh consumed | 0,127 €/km | 20,35 € |
| Trip total | 62,36 € | ||
| Segment | Distance | €/km | Cost |
|---|---|---|---|
| Paris → Valence, A7initial energy charged at home · 0,20 €/kWh | 513 km85 kWh consumed | 0,033 €/km | 16,93 € |
| Valence, A7 → Marseilleenergy charged at Ionity 289 kW · 0,60 €/kWh | 262 km43 kWh consumed | 0,099 €/km | 25,96 € |
| Trip total | 42,89 € | ||
How many kilometres do you recover depending on the time spent at the charger? Comparison at nominal peak power.
| Charging stop duration | Tesla Model X Performance | Mercedes GLC 400 4MATIC X254 |
|---|---|---|
| 5 minutes | ~69 km | ~117 km |
| 10 minutes | ~138 km | ~233 km |
| 20 minutes | ~276 km | ~467 km |
| Full session 10 → 80 % | ~331 km26 min | ~399 km18 min |
Replace one of the two with an alternative from the same segment
778 ch · 100 kWh · 2020
489 ch · 94 kWh · 2025
The advantage comes from the combo real range + charging speed. On Paris → Marseille (775 km at 130 km/h), the GLC 400 4MATIC X254 arrives in 7h11 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: 62,36 € (Model X Performance) and 42,89 € (GLC 400 4MATIC X254). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.