In article ch.edu>, Daniel J. Stern wrote:
> On Wed, 11 May 2005, dyno wrote:
>
>> >>Since alcohols have less energy per volume and must run much richer to
>> >>maintain the same relative A/F, one increases the delivered fuel volume.
>> >
>> > Thereby getting less work (or "power", if you must) out of any given
>> > volume of fuel. Exactly.
>
>> Your point was that one could NOT get the power back.
>
> That was (and is) one of my points, and for virtually the entire on-road
> fleet in North America, it's quite true. Even the flex-fuel models!

Some flex fuel vehicles can take advantage of some of the anti-knock
properties of E85. However, one needs an engine set up for E85 to take
full advantage of it, just as with high octane gasoline. The compression
ratio has to be there.