UK gallons
A UK gallon is a unit of volume used in the United Kingdom for measuring liquids such as fuel and water. One UK gallon is about to 4.54609 liters or 0.16054 cubic feet making it substantially larger than the US gallon.
Cubic Centimeters
A cubic centimeter (cm³) is the volume of a cube 1 centimeter on each side, and is the same as a milliliter. Engine sizes are quoted in it, so a 1,600cc engine is 1.6 liters.