Automotive industry is producing vehicles that are more fuel efficient and lower in emissions due to stricter regulations and evolving environmental concerns.This can be achieved by optimization of automotive Powertrain. This paper presents the study of different trends in powertrain optimization which includes tackling the major problem of friction, improving functioning of alternative or hybrid powertrains, clutch engagement control in mechanical powertrains as well as study of the case study of efficiency improvement on powertrain design done by VOLVO involving Super truck.