On Tue, 15 Aug 2006 16:40:11 GMT, Larry Dighera
wrote:
How does the energy density of LNG compare to ethanol?

It's less than gasoline, but I'm not sure how it compares to
ethanol... Do you mean LNG or LPG though?

Propane has an octane rating of 110 to 120... Sounds great, right?
Unfortunately, the weight of the tanks is what would probably get
us... Our tanks would have to be built quite a bit sturdier to handle
the increased pressure... Although typical operating pressures are
around 130 psi, tanks are typically rated to over 300 psi...

With LNG, you need either higher pressure or a cooling system...

Here's some info:
http://www.wps.com/LPG/WVU-review.html