costs for Portugal:

1 kwh ranges from 0,15 to 0.16 €

25kwh * 0.16€ = 4€ (100 miles/160km)

My diesel ICE does ~5.5 l/100km (42.8 mpg) and diesel is at around 1.98€/l

8.8 l * 1.98€ = 17.43€