bmw-801d

Hi all! So I am writing this just because I thought I knew a decent amount about the 190, but today I found some sources saying that the 801D engine ran only on 100 octane fuel? I’m just a little confused as I always thought it ran off of the 87 octane B-4 gas. Another question I would like to...

Neglect the red lines. The engine was not allowed for more than 1,35 ata from March 1942 to a date unknown by me. The thin lines show the power with ram effect accounted in.