Skip to main content
CaralogyCaralogy
HomeBrandsRoad TripBudgetDuelGuides
Caralogy

The car comparison platform. Physics simulation, road trips, real costs.

Navigation
All brandsCar duelRunning costsMotorwayMethodology
Simulators
Motorway simulatorRunning costsPerformance duel
Brands
VolkswagenBMWMercedesToyotaTeslaAudi
FRENDEESIT
© 2026 Caralogy · All rights reserved
  1. Home
  2. /Motorway
  3. /saloon
A430iPetrolvsB118dDiesel
  • MotorwayMotorwayRange and charging
  • PerformancePerformance0-100, top speed
  • ConsumptionConsumptionYearly cost
  • Specs430i · 118d

BMW 430i Convertible G22 vs BMW 118d F40

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

saloon · 2021 vs 2021 · Paris → Marseille · 775 km · 130 km/h
BMWPetrol

430i Convertible G22

258 ch · 2021

VS
BMWDiesel

118d F40

150 ch · 2021

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

Result · total trip time

ABMW 430i Convertible G22

7h01no stop

0 stops · 94.18 €

GapLess than a minute apart
BBMW 118d F40

7h01no stop

0 stops · 72.32 €

Paris → Marseille · 130 km/h · Caralogy simulation
Measure430i Convertible G22118d F40Gap
Total time7h017h01Less than a minute apart
Charging stops0 stops0 stopsSame
Cost of energy used94.18 €72.32 €21.86 € · 118d F40

Visualise the trip

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

BMWPetrol
430i Convertible G22
100%
1054 km
Range
Paris
0 km · departure
Marseille
775 km · Arrival 7h01
0
Stops
7h01
Duration
94.18 €
Cost of energy used
BMWDiesel
118d F40
100%
977 km
Range
Paris
0 km · departure
Marseille
775 km · Arrival 7h01
0
Stops
7h01
Duration
72.32 €
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 430i Convertible G22 versus no stop for the 118d F40.

Motorway consumption: the Caralogy methodology

The official WLTP figures (6,4 L/100km for 430i Convertible G22 and 4,7 L/100km for 118d F40) 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 (430i Convertible G22) and 4,3 L/100km (118d F40). 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 430i Convertible G22

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

BMW 118d F40

SegmentEnergy usedDistanceConsumption€/kmCost (€)
Paris → Marseillefuel · 2.17 €/L775 km33 L consumed0.093 €/km72.32 €
Trip total72.32 €

What produces these figures

WLTP combined consumption
6.4 L/100 km · 4.7 L/100 km
Fuel tank
59 L · 42 L

Compare with another vehicle

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

BMWPetrol

430i Convertible G22

258 ch · 2021

BMWDiesel

118d F40

150 ch · 2021

Other duels you might be interested in

BMWVSVolvo

430i Convertible vs S60 T5 Geartronic

BMWVSAudi

118d vs A3 Sedan

BMWVSAudi

430i Convertible vs A4 45 TFSI quattro

BMWVSAudi

118d vs A3 Sportback

Frequently asked questions

On Paris → Marseille (775 km at 130 km/h), the 430i Convertible G22 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 € (430i Convertible G22) and 72.32 € (118d F40). For reference, an equivalent Peugeot 508 1.6 PureTech 180 (~7.2 L/100 km) would cost about 103 € in fuel.