Vision Engineer, a very useful resource originally founded out of Imperial College in the UK, has posted a set of tables detailing the physical and chemical properties of a range of alternative fuels:

• Natural Gas

• Liquefied Petroleum Gas [LPG]

• Dimethyl Ether [DME]

• Biodiesel [Fatty Acid Methyl Esters]

• Bioethanol

• Ethyl Tertiary-butyl Ether [ETBE]

Although the full tables may be more information than some need, they provide essential information for  comparing the capabilities and potential benefits of these fuels.