From everything I've read it's more like 104-105 (R+M)/2 octane. Those 107-110 numbers might be from UK types quoting RON numbers maybe?
Also, like Dre said, it burns cooler, and on top of that it takes more energy to evaporate than gasoline. This means as it turns from a liquid to a gas it cools the intake charge more than gasoline does.
Also, like Dre said, it burns cooler, and on top of that it takes more energy to evaporate than gasoline. This means as it turns from a liquid to a gas it cools the intake charge more than gasoline does.