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AG9vsBGLCBEV
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  • SpecsG9 · GLC

Xpeng G9 vs Mercedes GLC 400 4MATIC with EQ Technology X254

Trip mapped at a glance. Charging stops visible, total duration predictable. Caralogy simulation at 130 km/h.

large SUV · 2024 vs 2025 · Paris → Marseille · 775 km · 130 km/h
XpengBEV

G9

543 ch · 91 kWh · 2024

VS
MercedesBEVPlus rapide

GLC 400 4MATIC with EQ Technology X254

489 ch · 94 kWh · 2025

Simulation trip
Assumptions: 130 km/h · start 100 % · mild weather

Result · total trip time

AXpeng G9

7h27charging included

3 stops · 84.66 €

Gap16 minin favour of GLC 400 4MATIC with EQ Technology
BMercedes GLC 400 4MATIC with EQ Technology X254

7h11charging included

1 stop · 42.89 €

Paris → Marseille · 130 km/h · Caralogy simulation
MeasureG9GLC 400 4MATIC with EQ Technology X254Gap
Total time7h277h1116 min · GLC 400 4MATIC with EQ Technology X254
Charging stops3 stops1 stop2 stops · GLC 400 4MATIC with EQ Technology X254
Cost of energy used84.66 €42.89 €41.77 € · GLC 400 4MATIC with EQ Technology X254

Visualise the trip

Both vehicles drive at 130 km/h. The difference comes from charging stops.

XpengBEV
G9
100%
360 km
Range
Paris
0 km · departure
Charge 1
8 min · +36 kWh · 21.84 €
Charge 2
8 min · +36 kWh · 21.84 €
Charge 3
11 min · +49 kWh · 29.14 €
Marseille
775 km · Arrival 7h27
3
Stops
7h27
Duration
84.66 €
Cost of energy used
MercedesBEVFastest
GLC 400 4MATIC with EQ Technology X254
100%
570 km
Range
Paris
0 km · departure
Charge 1
10 min · +48 kWh · 28.93 €
Marseille
775 km · Arrival 7h11
1
Stops
7h11
Duration
42.89 €
Cost of energy used

The 16-minute lead of the GLC 400 4MATIC with EQ Technology X254 does not come from driving speed, but from 2 fewer charging stops on this route (1 vs 3).

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 with EQ Technology X254 versus 3 stops totalling 26 min for the G9.

Motorway consumption: the Caralogy methodology

The official WLTP figures (20,2 kWh/100km for G9 and 13,2 kWh/100km for GLC 400 4MATIC with EQ Technology 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 25,3 kWh/100km (G9) and 16,5 kWh/100km (GLC 400 4MATIC with EQ Technology X254). Full methodology: see the assumptions below the controls.

Recovery speed: 29,2 km/min versus 18,5 km/min

During the 10 minutes of charging for the GLC 400 4MATIC with EQ Technology X254, range recovers by 292 km. During the 26 cumulative minutes for the G9, range recovers by 480 km. Per minute: the GLC 400 4MATIC with EQ Technology X254 recovers 1,6× 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.

For reference: how much would an equivalent petrol car cost?

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 1,3× the electric cost of the G9 and 2,6× that of the GLC 400 4MATIC with EQ Technology X254. The gap narrows in winter but never reverses.

Energy cost breakdown for your trip Paris → Marseille

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.

Xpeng G9

SegmentEnergy usedDistanceConsumption€/kmCost (€)
Paris → Tournus, A6initial energy charged at home · 0.20 €/kWh324 km82 kWh consumed0.051 €/km16.39 €
Tournus, A6 → Limonest, A6energy charged at Ionity 273 kW · 0.60 €/kWh144 km36 kWh consumed0.152 €/km21.84 €
Limonest, A6 → Montélimar, A7energy charged at Ionity 273 kW · 0.60 €/kWh144 km36 kWh consumed0.152 €/km21.84 €
Montélimar, A7 → Marseilleenergy charged at Ionity 265 kW · 0.60 €/kWh162 km41 kWh consumed0.152 €/km24.59 €
Trip total84.66 €

Mercedes GLC 400 4MATIC with EQ Technology X254

SegmentEnergy usedDistanceConsumption€/kmCost (€)
Paris → Valence, A7initial energy charged at home · 0.20 €/kWh513 km85 kWh consumed0.033 €/km16.93 €
Valence, A7 → Marseilleenergy charged at Ionity 289 kW · 0.60 €/kWh262 km43 kWh consumed0.099 €/km25.96 €
Trip total42.89 €

Range recovered by stop duration

How many kilometres do you recover depending on the time spent at the charger? Comparison at nominal peak power.
Charging stop durationXpeng G9Mercedes GLC 400 4MATIC with EQ Technology X254
5 minutes~69 km~117 km
10 minutes~139 km~233 km
20 minutes~277 km~467 km
Full session 10 → 80 %~252 km · 20 min~399 km · 18 min

What produces these figures

WLTP combined consumption
20.2 kWh/100 km · 13.2 kWh/100 km
Net battery
91 kWh · 94 kWh
Max DC charging
300 kW · 330 kW

Compare with another vehicle

Replace one of the two with an alternative from the same segment

XpengBEV

G9

543 ch · 91 kWh · 2024

MercedesBEV

GLC 400 4MATIC with EQ Technology X254

489 ch · 94 kWh · 2025

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SQ6 Sportback e-tron vs GLC 400 4MATIC with EQ Technology

Frequently asked questions

The advantage comes from the combo real range + charging speed. On Paris → Marseille (775 km at 130 km/h), the GLC 400 4MATIC with EQ Technology 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.

On this trip, the energy used costs 84.66 € (G9) and 42.89 € (GLC 400 4MATIC with EQ Technology X254). For reference, an equivalent Peugeot 3008 1.2 PureTech 130 (~7.8 L/100 km) would cost about 112 € in fuel.