Audi benefits from the use of a fabric roof when it comes to the S4’s trunk shape and volume. First, the liftover height is low and the opening large. Second, the trunk is deep if not particularly tall, and it’s usefully shaped. Third, there’s a small pass-through to the rear seat for longer items. Fourth, despite the 10.2 cu.-ft. trunk (top up) and all-wheel-drive mechanicals, Audi found a way to stuff a full-size spare under the floor. People who take frequent road trips will love this car for these reasons.