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Home›Motorway›Porsche 718 vs BMW 420d

Motorway range comparison

Porsche 718 Boxster GTS PDK vs BMW 420d G22

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

PorschePetrol

718 Boxster GTS PDK

365 ch · 2018

VS
BMWDieselPlus rapide

420d G22

190 ch · 2021

MotorwayRange & chargingPerformance0-100, top speedConsumptionAnnual TCO
Simulation trip

Paris → Marseille · 130 km/h · Caralogy simulation

718 Boxster GTS PDK420d G22
Total time7h167h01−15 min
Charging stops3 stops0 stops−3 stops
Total cost409,65 €61,45 €−348,20 €

Visualise the trip

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

PorschePetrol
718 Boxster GTS PDK
100%
222 km
Range
Paris
0 km · departure
Refuel 1
5 min · +58 L · 117.10 €
Refuel 2
5 min · +58 L · 117.10 €
Refuel 3
5 min · +58 L · 117.10 €
Marseille
775 km · Arrival 7h16
3
Stops
7h16
Duration
409,65 €
Cost
BMWDieselFastest
420d G22
100%
1513 km
Range
Paris
0 km · departure
Marseille
775 km · Arrival 7h01
0
Stops
7h01
Duration
61,45 €
Cost

Analysis

The 15-minute lead of the 420d G22 does not come from driving speed, but from 3 fewer charging stops on this route (0 vs 3).

Both vehicles drove at 130 km/h for the entire trip. The gap is built at the stops: no stop for the 420d G22 versus 3 stops totalling 15 min for the 718 Boxster GTS PDK.

Motorway consumption: the Caralogy methodology

The official WLTP figures (10,7 L/100km for 718 Boxster GTS PDK and 4,2 L/100km for 420d 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 26,0 L/100km (718 Boxster GTS PDK) and 3,9 L/100km (420d G22). Full methodology: see the dedicated button above the summary.

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.

Porsche

718 Boxster GTS PDK

SegmentDistance€/kmCost
Paris → Beaune, A6fuel · 2,03 €/L222 km58 L consumed0,527 €/km117,10 €
Beaune, A6 → Limonest, A6fuel · 2,03 €/L222 km58 L consumed0,527 €/km117,10 €
Limonest, A6 → Manosque, A51fuel · 2,03 €/L222 km58 L consumed0,527 €/km117,10 €
Manosque, A51 → Marseillefuel · 2,03 €/L110 km29 L consumed0,530 €/km58,35 €
Trip total409,65 €
BMW

420d G22

SegmentDistance€/kmCost
Paris → Marseillefuel · 2,03 €/L775 km30 L consumed0,079 €/km61,45 €
Trip total61,45 €

Compare with another vehicle

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

PorschePetrol

718 Boxster GTS PDK

365 ch · 2018

BMWDiesel

420d G22

190 ch · 2021

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Frequently asked questions

On Paris → Marseille (775 km at 130 km/h), the 420d G22 arrives in 7h01 with 0 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: 409,65 € (718 Boxster GTS PDK) and 61,45 € (420d G22). An equivalent petrol SUV (~8 L/100 km) would cost about 115 € in motorway fuel. Electric costs less in energy but adds charging stops.