Octane Rating: Alcohol is, on the average, about 16 points higher on the research octane scale than premium gasoline.
Heat value: There's oxygen in the alcohol's structure which means that this fuel will naturally be "leaner". This is one reason why we must add more fuel when burning alcohol by increasing the size of the jets
Volatility : Very volatile fuel is potentially dangerous. Alcohol, has a higher flash point than gasoline, making it a much safer automotive fuel.
Exhaust Emissions: The emission produced by a vehicle running on alcohol are far lesser than a vehicle on any other fuel.