Heat of combustion for some common fuels (higher value)

Reference 1: HHV MJ/kg, kcal/g and BTU/lb.

Reference 2: Hydrogen, Gasoline, Diesel, Ethanol, Propane, Butane, Wood, Coal (lignite), Coal (anthracite)[citation needed] and Natural gas.

Source: http://en.wikipedia.org/wiki/Standard_enthalpy_change_of_combustion