The big downside of full-time 4WD and AWD is that they use much more fuel than part-time 4WD because the engine has to transfer power to all four wheels, all the time.
Ang malaking downside ng full-time 4WD at AWD ay na ginagamit nila mas fuel kaysa part-time 4WD dahil ang engine ay may upang ilipat ang kapangyarihan sa lahat ng apat na gulong, lahat ng oras.