On a 100 km mixed trip, the BMW M4 Convertible and Porsche 911 Targa 4 GTS have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.
What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.
3,486 €per year
10,7 L/100 km weighted · 23.24 € per 100 km · 1 607 L per year
3,597 €per year
11,1 L/100 km weighted · 23.98 € per 100 km · 1 658 L per year
| Profile | Split | AA · M4 | BB · 911 | Gap |
|---|---|---|---|---|
| City70 / 25 / 5 | 70 % city · 25 % road · 5 % motorway | 3,911 € | 3,939 € | Nearly level |
| Mixed30 / 50 / 20 | 30 % city · 50 % road · 20 % motorway | 3,486 € | 3,597 € | 111 € · M4 |
| Long-distance10 / 40 / 50 | 10 % city · 40 % road · 50 % motorway | 3,164 € | 3,323 € | 159 € · M4 |
Cumulative saving for the M4 Convertible
Energy only. Excludes purchase, insurance, servicing, depreciation.
On a 100 km mixed trip, the BMW M4 Convertible and Porsche 911 Targa 4 GTS have a near-identical cost per km with default parameters. The gap becomes significant once you enter your actual energy prices.
The BMW M4 Convertible is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.