Holy Lazarus thread, Batman!!
First, alcohol stoves get plenty hot. The important variable is the power (or energy/time) produced by the stove burner. Modern non-pressurized alcohol stoves are rated at about 6800 btu/hr/burner, while most marine propane stoves are rated at about 7000 btu/hr/burner. Not enough of a difference to worry about. I use an Origo stove all the time, it works fine.
Second, an unvented diesel stove is a really bad idea. Not only do the fumes stink, but they're much more hazardous than those from kerosene (the logical alternative in such a stove).
Never forget them. Do something to prevent it from happening again.
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