The Audi S8 is equipped with a commodious 14.6 cu.-ft. cargo area, usefully shaped and complete with a power opening and closing lid. The trunk floor has an odd recess with a lip that makes it hard to stow roll-away bags, but a low liftover height and large opening help make loading easier. Audi includes an almost full-size spare (255/45R18) under the nicely finished compartment, and there’s a pass-through to the cabin for longer items. Closing the lid is easy thanks to a button that powers the lid down and latches it shut.