European mpg is not the same rating as the United States mpg mostly because a gallon is not the same size everywhere, as ridiculous as that fact is. http://jal

European mpg is not the same rating as the United States mpg mostly because a gallon is not the same size everywhere, as ridiculous as that fact is. http://jalopnik.com/5981938/why-do-european-cars-get-better-mpg-than-us-cars http://jalopnik.com/5981938/why-do-european-cars-get-better-... Using your number of 78mpg imperial for the Lupo, this is only about 64mpg us.