1.0-Liter Engines: Honda Motor Company only ever mass-produced a single 1.0-liter sized engine for use in their production vehicles sold in the United States. The Honda 1.0 engine is a part of the EO engine class which is full of Honda’s 3-cylinder engines.
ECA1 - This 1.0-liter inline 3-cylinder engine manufactured by Honda Motor Company was used as a 2000-2006 Honda Insight engine. It had 4 valves-per-cylinder, single overhead cams (SOHC), 10.8:1 compression, and produced anywhere from 67-72 hp from the factory.