Question 1

Why do European cars use L/100km instead of km/L?

Accepted Answer

L/100km is linear with fuel consumption — double the fuel use means double the number. This makes it easier to compare costs and CO₂ emissions directly. km/L and MPG are hyperbolic, making differences at the inefficient end appear smaller than they actually are.

Question 2

How do hybrid and EV efficiency compare to gasoline?

Accepted Answer

Hybrids achieve 20-25 km/L (47-59 MPG US). EVs use kWh/100km instead, typically 15-20 kWh/100km. Converting to equivalent fuel economy: 1 kWh ≈ 0.09 L gasoline equivalent, so 15 kWh/100km ≈ 1.35 L/100km equivalent (74 km/L).