Which is performing more efficiently? A car getting 12 km per liter of gas or one getting 25 miles per hour?

25mpg..excluding other factors

1 mph = 1.609 km/h

To determine which car is performing more efficiently, we need to convert both measurements to a consistent unit. In this case, we can convert both values to kilometers per liter.

First, let's convert the second measurement from miles per hour to kilometers per liter.

To do this conversion, we need to know the fuel efficiency of the second car in miles per gallon (mpg). If you have this information, please provide it so we can proceed with the calculation.