With a large cabin and a much improved interior, the 2008 Chevrolet Impala seats up to six adults in reasonable comfort, though materials are still not up to the levels seen in a Honda Accord.
Car and Driver compares the front seats with their "favorite recliner," but says "the slightest hint of aggression will rock you out of your comfort zone." Cars.com reports "firmer cushions and increased lumbar support" in the SS. Edmunds feels “occupants will find hip- and shoulder room plentiful, but legroom is mediocre for a car of this size.”
The vast room leads to a trunk that’s equally useful. Cars.com states "trunk space totals 18.6 cubic feet." ConsumerGuide reports that this Chevrolet 2008 model's "trunk is roomy, with a usefully flat floor," but "an oddly shaped opening hampers loading bulky objects"; in addition, they note, "cabin storage is merely adequate."
The wide-open spaces inside are styled and finished better than in the previous Impala, but the Chevy sedan still runs behind the class leaders. Car and Driver is not particularly impressed with the interior materials and assembly, especially when it comes to driver controls: "Although the redesign for 2005 greatly improved the interior, the Impala’s cabin materials still pale next to those of the Honda Accord, Toyota Avalon, and Hyundai Azera." ConsumerGuide expresses similar sentiments: "cabin materials are serviceable, but Impala trails most like-priced rivals for quality feel...hard plastic expanses dominate the cabin, giving it a budget look and feel." Edmunds says "the Impala's interior is a huge improvement over its predecessor and a nice enough place to spend time, but competitors score higher style and quality points."
In both 2008 Chevrolet Impala V-6 models especially, the interior is quite hushed and well isolated from road noise. ConsumerGuide feels "wind rush and tire roar both intrude slightly... in rapid acceleration, the V6s emit prominent growl," while "the V8 is subdued at cruise but has muscle-car rumble under throttle."