[uuddlrlrbaba]

You keep using SUV and CUV interchangeably. They are distinct frame designs. SUV is built on a ladder frame like a truck. CUV is built with a unibody car chassis.

CUV is far lighter duty, and far better in handling, driving dynamics and efficiency. Especially in models tuned for enthusiast drivers.

As for the efficiency of a sedan, you'll be hard pressed to convince me that putting non-cabin over the majority of the frame is an efficient design. Heck even a prius is a hatchback, not a sedan.