Impact of fuel chemical function characteristics on spark assisted and kinetically controlled compression ignition performance focused on multi-mode operation

•Fuel RON and octane sensitivity did not define fuel performance in either advanced combustion mode.•Both advanced combustion modes required substantial intake heating and boosting for proper operation.•Performance under boosted, high-load spark ignition combustion was not significantly affected by fuel choice.•High octane sensitivity fuel (Alkylate) outperformed other fuels in partial fuel stratification.