Even the lowly old Chev small block can be setup to run that compression-- and work on 90 octane fuel.
Alot has been learned about rod lengths / chambers/ etc., which affect preignition .
with injectors and variable valve/intake runners - all kinds of previously impossible stuff can be done.
The ZDZ 10-1 compression rating is misleading .
If one is really keen on finding actual measured compression ratios - -- the old " measure the volumes with oil" is still the best bet .
the calculated ratios (like most calculations) simply tell you your pencil is making a mark on the paper.
The actual compressed charge changes in density as the engine goes from idle to full tilt .