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The impacts of cylinder bore surface finish and coating treatment on the tribological characteristics of engine components were determined by using a modified Cameron-Plint Friction and Wear Tester. The friction and wear behavior of several honed cylinder bores was compared using plateau-honed and brush-honed bores in a normal, lubricated sliding wear mode. Several experimental thermal sprayed aluminum bores, prepared following a water jet cleaning process, were compared to production cast iron plateau-honed bores. For the cast iron bores, it was observed that most of the wear occurred within the first 2 hours of the run-in stage. In general, the combination of a cast iron bore sliding against molybdenum sprayed piston rings showed lower friction and wear compared to the thermal spayed aluminum bore samples sliding against the same rings. The rough-honed bore samples demonstrated much higher wear than the plateau-honed or brush-honed bores.