Here in Spain we have 95 and 98 octanes but is different than in USA because you use there the octane index PON or AKI = (RON + MON) / 2 and in Europe we use the RON index.
So to compare:
87 AKI = ~ 92 RON
89 AKI = ~ 94 RON
91 AKI = ~ 96 RON
95 AKI = ~ 100 RON
Here I found another table:
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