BMWPetrol
M4 Convertible F82
431 ch · 2018
Trip mapped at a glance. Charging stops visible, total duration predictable. Caralogy simulation at 130 km/h.
| Measure | M4 Convertible F82 | 840i Convertible G15 | Gap |
|---|---|---|---|
| Total time | 7h06 | 7h01 | 5 min · 840i Convertible G15 |
| Charging stops | 1 stop | 0 stops | 1 stop · 840i Convertible G15 |
| Cost of energy used | 146.31 € | 104.27 € | 42.04 € · 840i Convertible G15 |
Both vehicles drove at 130 km/h for the entire trip. The gap is built at the stops: no stop for the 840i Convertible G15 versus 1 stop of 5 min for the M4 Convertible F82.
The official WLTP figures (10,2 L/100km for M4 Convertible F82 and 7,5 L/100km for 840i Convertible G15) 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 8,7 L/100km (M4 Convertible F82) and 6,2 L/100km (840i Convertible G15). Full methodology: see the assumptions below the controls.
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Montélimar, A7 | fuel · 2.17 €/L | 621 km | 54 L consumed | 0.189 €/km | 117.18 € |
| Montélimar, A7 → Marseille | fuel · 2.17 €/L | 154 km | 13 L consumed | 0.189 €/km | 29.13 € |
| Trip total | 146.31 € |
| Segment | Energy used | Distance | Consumption | €/km | Cost (€) |
|---|---|---|---|---|---|
| Paris → Marseille | fuel · 2.17 €/L | 775 km | 48 L consumed | 0.135 €/km | 104.27 € |
| Trip total | 104.27 € |
Replace one of the two with an alternative from the same segment
431 ch · 2018
333 ch · 2021
On Paris → Marseille (775 km at 130 km/h), the 840i Convertible G15 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 146.31 € (M4 Convertible F82) and 104.27 € (840i Convertible G15). For reference, an equivalent Peugeot 508 1.6 PureTech 180 (~7.2 L/100 km) would cost about 103 € in fuel.