Ethanol burns fast. Burning fast has nothing to do with AKI (Anti Knock Indexing). Octane Rating is an AKI. Ethanol is incredibly knock-resistant for such a fast-burning fuel.

Koenigsegg made a version of their CCX with an E85 engine that gained almost 100 horses over the identical gas engine. Ethanol is not to be feared, Ethanol is racegas of the future.