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A540iPetrolvsB318dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs540i · 318d

BMW 540i xDrive G30 vs BMW 318d Steptronic G20

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

grand tourer · 2020 vs 2019 · Paris → Marseille · 775 km · 130 km/h
BMWPetrol

540i xDrive G30

333 ch · 2020

VS
BMWDiesel

318d Steptronic G20

150 ch · 2019

Simulation trip
Assumptions: 130 km/h · start réservoir plein · mild weather

Result · total trip time

ABMW 540i xDrive G30

7h01no stop

0 stops · 94.18 €

GapLess than a minute apart
BBMW 318d Steptronic G20

7h01no stop

0 stops · 70.63 €

Paris → Marseille · 130 km/h · Caralogy simulation
Measure540i xDrive G30318d Steptronic G20Gap
Total time7h017h01Less than a minute apart
Charging stops0 stops0 stopsSame
Cost of energy used94.18 €70.63 €23.55 € · 318d Steptronic G20

Visualise the trip

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

BMWPetrol
540i xDrive G30
100%
1214 km
Range
Paris
0 km · departure
Marseille
775 km · Arrival 7h01
0
Stops
7h01
Duration
94.18 €
Cost of energy used
BMWDiesel
318d Steptronic G20
100%
952 km
Range
Paris
0 km · departure
Marseille
775 km · Arrival 7h01
0
Stops
7h01
Duration
70.63 €
Cost of energy used

Very close result: less than one minute apart on this route. Both vehicles are evenly matched on the motorway over this distance.

Both vehicles drove at 130 km/h for the entire trip. The gap is built at the stops: no stop for the 540i xDrive G30 versus no stop for the 318d Steptronic G20.

Motorway consumption: the Caralogy methodology

The official WLTP figures (6,8 L/100km for 540i xDrive G30 and 4,5 L/100km for 318d Steptronic G20) 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 5,6 L/100km (540i xDrive G30) and 4,2 L/100km (318d Steptronic G20). Full methodology: see the assumptions below the controls.

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.

BMW 540i xDrive G30

SegmentEnergy usedDistanceConsumption€/kmCost (€)
Paris → Marseillefuel · 2.17 €/L775 km43 L consumed0.122 €/km94.18 €
Trip total94.18 €

BMW 318d Steptronic G20

SegmentEnergy usedDistanceConsumption€/kmCost (€)
Paris → Marseillefuel · 2.17 €/L775 km33 L consumed0.091 €/km70.63 €
Trip total70.63 €

What produces these figures

WLTP combined consumption
6.8 L/100 km · 4.5 L/100 km
Fuel tank
68 L · 40 L

Compare with another vehicle

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

BMWPetrol

540i xDrive G30

333 ch · 2020

BMWDiesel

318d Steptronic G20

150 ch · 2019

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Frequently asked questions

On Paris → Marseille (775 km at 130 km/h), the 540i xDrive G30 arrives in 7h01 with 0 fuel stops.

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 94.18 € (540i xDrive G30) and 70.63 € (318d Steptronic G20). For reference, an equivalent BMW 530i (~8.0 L/100 km) would cost about 115 € in fuel.