Over the past decade the use of the alternative fuels for diesel engine has received renewed attention, due to intake air and emit, among others, the pollutants NOX and particulate matter. Also increase in stringent emission regulations and anticipated depletion of worldwide petroleum reserves in future provide a strong encouragement to carry out research on alternate fuels. Hydrogen is one of the most promising alternative fuels. Beside hydrogen is expected to be one of the most important fuels in the near future for solving greenhouse problem for protecting environment and saving conventional fuels. In this experimental investigation, the effects of hydrogen and diesel fuel in dual-fuel mode in a compression ignition engine to performance of a four cylinders, four stroke, direct injection, and turbocharged diesel engine were experimentally investigated. The hydrogen was sent with carburetion technical through intake manifold and diesel was injected directly inside the combustion chamber. The hydrogen -diesel-air mixture was stoichiometric and provided favorable conditions for generating combustion knock. Performance parameters such as brake thermal efficiency, torque, power, volumetric efficiency, specific fuel consumption was determined. Test results showed that use of hydrogen intake manifold in a diesel engine torque increased averagely of 8.3% 7.5% hydrogen addition ratio comparing with standard diesel operation and engine power increased 17% 7.5% hydrogen addition ratio. Engine thermal efficiency showed an increase at a rate of 22% at 5% hydrogen addition ratio. The specific fuel consumption of 5% hydrogen-diesel dual fuel reduced averagely 3.5% for duel fuel operation comparing with the SDE.