We have converted 81 Miles per Gallon to 3.5 Litres per 100 kilometres.
81 MPG = 3.5
Fuel Consumption Converter
Use this tool to convert car fuel consumption from Miles per Gallon (MPG) to Litres per 100 kms. Find out the fuel (petrol or diesel) consumption of a car if it is defined in units you do not use or understand.