Vehicular power unit arrangement structure and method

A power unit arrangement structure for a vehicle is provided with a side-member (1) extending in a fore and aft direction of a mounting room (3) and enabled to achieve buckling deformation in the fore and aft direction during a frontal collision, a sub-frame (7) extending in the mounting room along the fore and aft direction at an area below the side-member, a mount member (6) having respective an insulating function and permitting a power unit to be supported with the side-member, a bent portion (11) disposed at a substantially intermediate portion of the sub-frame in the fore and aft direction and having a downwardly bent configuration, and a connecting member (12) connecting a lower portion of the power unit to the sub-frame in the vicinity of the bent portion. The mount member is capable of tearing in response to relative movement of the side-member and the power unit in the fore and aft direction during the frontal collision. The sub-frame has a part having a substantially V-shaped configuration in a side view. With such a structure, a falling behavior of the power unit is stably controlled during the frontal collision of the vehicle.