What kind of octane rating does Alcohol have compared to Propane?

[Qualitywires.com]

I am looking into a few injection systems to raise octane, but not quite sure which is better. I'm thinking propane is going to be the best bet because it's non liquid and already in a gas form. But the only thing that makes me nervous is having a tank in the rear of the car that could explode.

Are my worries too much?

But anyways...which would be a cheaper route and better route to go?

 

[Fast Freddy]

alcohol runs cooler than propane therefore it is less prone to detonation. it also burns much faster so the amount of fuel burned doubles in volume.

 

[utahviper]

Methanol has an octane rating of approximately 110. Propane I think is around 140. I could be wrong on the propane. If you are running a sc'er then I would suggest the methanol because of its' cooling effect.