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Old 01-07-2013, 05:47 AM   #13
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Originally Posted by doublej View Post
Hello "suss6052", your calculations might change if you use the right conversion factor.... 4.54 litres to a imperial gallon compared to your US gallon which is only 3.78 litres.
The calculation is correct even if I wrote down a slightly lower number for the imperial gallon, the point wasn't the specific size so much as it was the fact that the imperial gallon contains 20% more volume and therefore the published figures are 20% apart before accounting for differences in test methodologies.

Therefore subtracting the energy difference (a factor of 20%) the only remaining difference is that of the tests run to get the fuel economy figures.
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