Subject: How does the expansion of gunpowder compare to that of gasoline?

Both gunpowder and gasoline are burnt to create gas to create pressure to do
work. The occasional experiment with powder-powered engines indicates some folks
think they're similar enough in performance to be somewhat interchangeable
(obviously the liquid/solid and oxidizer issues must be overcome). Information
on the performance of the two substances seems hard to come by, though. What
are, and/or where might I find, numbers on:

- gas volume produced per original volume (or whatever is common useful measure;
pressure maybe?), and
- burn rate

for gasoline (and maybe diesel) and modern smokeless powder (and maybe black
powder)?

Re: How does the expansion of gunpowder compare to that of gasoline?