On a 100 km mixed trip, the BMW 420i is about 50% cheaper than the Porsche Boxster Spyder 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.
3,838 €per year
11,8 L/100 km weighted · 25.58 € per 100 km · 1 769 L per year
| Profile | Split | AA · Boxster | BB · 420i | Gap |
|---|---|---|---|---|
| City70 / 25 / 5 | 70 % city · 25 % road · 5 % motorway | 4,105 € | 2,194 € | 1,911 € · 420i |
| Mixed30 / 50 / 20 | 30 % city · 50 % road · 20 % motorway | 3,838 € | 1,973 € | 1,865 € · 420i |
| Long-distance10 / 40 / 50 | 10 % city · 40 % road · 50 % motorway | 3,558 € | 1,803 € | 1,754 € · 420i |
Cumulative saving for the 420i
Energy only. Excludes purchase, insurance, servicing, depreciation.
On a 100 km mixed trip, the BMW 420i is about 50% cheaper than the Porsche Boxster Spyder with default parameters. This ratio shifts with your actual energy prices - simulate for your profile.
The BMW 420i is cheaper across all distances with default rates. If your energy prices differ significantly, simulate to see the real impact on your budget.