naturally a litre was defined as an ARBITRARY measurement of an INcorrectly based distance around the earth. So the premise was wrong and all you have left is a 10 based system of larger and smaller arbitrary measurements.So milli's become liters. Gils become quarts and the US gallon is smaller than the imperial but it doesnt matter. Metric measurement is a convenience not a law of nature. The ONLY reason it is convenient is because it is based 10 which is what most of the world can accurately add and subtract using their fingies.
Bah,
thanx,
bill