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A120dDieselvsB420iPetrol
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs120d · 420i

BMW 120d xDrive F20LCI vs BMW 420i F32

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

compact · 2018 vs 2020 · Paris → Marseille · 775 km · 130 km/h
BMWDiesel

120d xDrive F20LCI

190 ch · 2018

VS
BMWPetrol

420i F32

184 ch · 2020

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

Result · total trip time

ABMW 120d xDrive F20LCI

7h01no stop

0 stops · 80.72 €

GapLess than a minute apart
BBMW 420i F32

7h01no stop

0 stops · 84.09 €

Paris → Marseille · 130 km/h · Caralogy simulation
Measure120d xDrive F20LCI420i F32Gap
Total time7h017h01Less than a minute apart
Charging stops0 stops0 stopsSame
Cost of energy used80.72 €84.09 €3.37 € · 120d xDrive F20LCI

Visualise the trip

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

BMWDiesel
120d xDrive F20LCI
100%
1083 km
Range
Paris
0 km · departure
Marseille
775 km · Arrival 7h01
0
Stops
7h01
Duration
80.72 €
Cost of energy used
BMWPetrol
420i F32
100%
1180 km
Range
Paris
0 km · departure
Marseille
775 km · Arrival 7h01
0
Stops
7h01
Duration
84.09 €
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 120d xDrive F20LCI versus no stop for the 420i F32.

Motorway consumption: the Caralogy methodology

The official WLTP figures (5,2 L/100km for 120d xDrive F20LCI and 5,8 L/100km for 420i F32) 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 4,8 L/100km (120d xDrive F20LCI) and 5,0 L/100km (420i F32). 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 120d xDrive F20LCI

SegmentEnergy usedDistanceConsumption€/kmCost (€)
Paris → Marseillefuel · 2.17 €/L775 km37 L consumed0.104 €/km80.72 €
Trip total80.72 €

BMW 420i F32

SegmentEnergy usedDistanceConsumption€/kmCost (€)
Paris → Marseillefuel · 2.17 €/L775 km39 L consumed0.108 €/km84.09 €
Trip total84.09 €

What produces these figures

WLTP combined consumption
5.2 L/100 km · 5.8 L/100 km
Fuel tank
52 L · 59 L

Compare with another vehicle

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

BMWDiesel

120d xDrive F20LCI

190 ch · 2018

BMWPetrol

420i F32

184 ch · 2020

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Frequently asked questions

On Paris → Marseille (775 km at 130 km/h), the 120d xDrive F20LCI 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 80.72 € (120d xDrive F20LCI) and 84.09 € (420i F32). For reference, an equivalent Peugeot 308 1.2 PureTech 130 (~6.8 L/100 km) would cost about 97 € in fuel.