In a message dated 8/22/2006 8:22:19 P.M. Eastern Standard Time,
dhaynes@OPTONLINE.NET writes:

To my  knowledge, a US gallon = 3.875 liters. Using this number, the mileage
for  the 1.9L TDI is ~ 25.3 average and the V6 ~ 20.1.

Maybe I'm missing  something.
Dennis
Yes, but an Imperial Gallon= 5 US Quarts