Well, the Malibu isn't exactly smaller than the car it replaces--it's roughly the same footprint. The bigger problem is weight--the new 'Bu is a full 200 lbs heavier than the next-heaviest Accord, and roughly 350 lbs more than some of the class featherweights like the Altima. All that extra weight hurts fuel economy and handling, and it's probably one of GM's biggest issues across model ranges right now (a fully-loaded Cruze is roughly the same weight as an Altima).







