You are misinformed. TFLcar
You are misinformed. TFLcar dot.com has a video which includes and in depth interview with one of the Mazda Engineers. Perhaps you may want to reference that. The information you are sharing is incorrect. Operators will have the option of using anything from 87 to 93 octane which as other commenters indicated, does not affect torque. Horsepower below 3000 rpms is also unaffected and it is not until the higher RPM range that the horsepower discrepancy presents. The engineer cites about 225 peak horsepower on 87 octane and i believe around 250 peak horspower when using 93 octane fuel. The engineer suggested there is minimal different in acceleration.