On a 100 km mixed trip, the BMW 420i Convertible is about 50% cheaper than the Porsche Cayman (Manual) with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.
What each kilometre costs, depending on your driving profile and how you charge. Annual projection and cumulative savings over 10 years.
4,195 €per year
12,9 L/100 km weighted · 27.97 € per 100 km · 1 933 L per year
| Profile | Split | AA · Cayman | BB · 420i | Gap |
|---|---|---|---|---|
| City70 / 25 / 5 | 70 % city · 25 % road · 5 % motorway | 5,351 € | 2,270 € | 3,080 € · 420i |
| Mixed30 / 50 / 20 | 30 % city · 50 % road · 20 % motorway | 4,195 € | 2,067 € | 2,128 € · 420i |
| Long-distance10 / 40 / 50 | 10 % city · 40 % road · 50 % motorway | 3,500 € | 1,914 € | 1,586 € · 420i |
Cumulative saving for the 420i Convertible
Energy only. Excludes purchase, insurance, servicing, depreciation.
On a 100 km mixed trip, the BMW 420i Convertible is about 50% cheaper than the Porsche Cayman (Manual) with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.
The BMW 420i Convertible is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.