The fuselage Imperials had a subframe within the stubframe that nestled the engine in a rubber mounted cradle, and the stubframe on these models were already isolated with rubber from the bodies. So there were two means of isolating the passenger compartment from noise and vibration. And the Imperials were realtively heavier than the New Yorkers, for example, as a result of the extra subframe as well as more lavish sound deadening in the passenger compartment and heavier seats and generally more options to improve comfort. Also the suspension was revised for this extra weight and the overall feel when driving one is foremost one of almost complete isolation from the road, very quiet and a feeling that the car is crushing any bumps in the road to achieve a totally smooth, unbothered riding experience. The refinement is clearly noticeable and fits what a luxury car is designed to deliver. And unlike its competition, the handling was still reasonable too.