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There is higher and higher demand by customers for vehicles with the maximum level of comfort, this aspect being a target to be achieved together with the general trend to increase performance and also with the necessity to reduce engine out emissions to satisfy the new environmental regulations. GMDAT has recently developed new EU5 2.0 and 2.2 liter L4-cylinder turbocharged Diesel engines that, to address customer demands, have improved power, lower exhaust gas emissions and NVH performance aligned to best in class in its segment. With the final aim of making this engine best in class from an NVH perspective, the NVH development has been executed in a very structured way, going through target setting and deployment, concept and design, combustion and mechanical development through computational analysis first and subsequently experimental tests.