Nope.... the increase of 1.1 CR yields only 5HP:

Bowling & Grippo CR/HP Calculator

The main difference is in the camshaft grind.... plus it's also likely that ignition timing is a little closer to the curve for best power. I don't think I'd run 87 octane in a 10:1 engine, but all engines react differently.

Here's the FSM that covers the 6G72 SOHC 12v and DOHC 24v variants in the Diamante and Montero, including the differences in the SOHC FWD and RWD engines. Note the difference in valve timing between the SOHC FWD and SOHC RWD cams:

6G72

Frank

'89 [color:"white"]G-Raider[color:"white"] [color:"black"]Supercharged 3.0L, MegaSquirt 2, lockup A/T, 2.5" exhaust, 172k, Cibie H4s/Oscar SCs, Hella Micro DE fogs, Cobra CB, Superwinch hubs, LSD rear/Aussie Locker front, Bilsteins, Lifeline AGM, Rust-Oleum