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G9BEVvs420iPetrol
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Xpeng G9 vs BMW 420i Steptronic Gran Coupe G22: which is cheaper to run?

What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.

large SUV · 2022 vs 2021 · 15,000 km/an · Mixed · Petrol 95 2.17 €/L · Home 0.20 €/kWh · Methodology
Annual mileage
15,000 km
5,000 km50,000 km
Driving mix

30 % City · 50 % Road · 20 % Motorway

Fuel price
Petrol 95 2.17 €/L · Diesel 2.38 €/Lprix-carburants.gouv.fr — moyenne nationale du 05/10/2026 ; EDF Tarif Bleu Base au 01/08/2026 ; DC autoroute : moyenne des réseaux sans abonnement
Charging type

Result · yearly energy cost

AXpeng G9

593 €per year

19,8 kWh/100 km weighted · 3.95 € per 100 km · 2 964 kWh per year

Gap1,558 € per yearin favour of the G9 (−72 %)≈ 718 L petrol 95
BBMW 420i Steptronic Gran Coupe G22

2,152 €per year

6,6 L/100 km weighted · 14.34 € per 100 km · 991 L per year

The verdict changes with your usage
ProfileSplitAA · G9BB · 420iGap
City70 / 25 / 570 % city · 25 % road · 5 % motorway505 €2,422 €1,917 € · G9
Mixed30 / 50 / 2030 % city · 50 % road · 20 % motorway593 €2,152 €1,558 € · G9
Long-distance10 / 40 / 5010 % city · 40 % road · 50 % motorway701 €1,943 €1,242 € · G9

Cumulative saving for the G9

1 year
1,558 €
3 years
4,675 €
5 years
7,792 €
10 years
15,585 €

Energy only. Excludes purchase, insurance, servicing, depreciation.

What produces these figures

WLTP combined
19.0 kWh/100 km · 6.3 L/100 km
Powertrain
Fully electric · Combustion
Power
308 ch · 184 ch
Kerb weight
2,210 kg · 1,570 kg

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Frequently asked questions

On a 100 km mixed trip, the Xpeng G9 is about 70% cheaper than the BMW 420i Steptronic Gran Coupe with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.

The declared range of the Xpeng G9 is 520 km (WLTP/EPA). In real-world conditions, expect 10-20% less.

The Xpeng G9 is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.

G9
· 420i