body roll

Body roll in simplest terms, is the tendancy for the body (and passengers) of the car to lean in the opposite direction the car is turning. This is caused by inertia, though the wheels are traveling a circular path during a turn, the vehicle wants to continue on in a straight line. Every vehicle suffers from body roll to some degree. As to how severe the IS300 suffers from body roll all depends on your expectations and to what cars you compare it to.