Practical car shoppers may look at the Audi A6 and think it's more useful than the sexy A7 hatchback. The reality may be a little more nuanced: the A6 has more head room, but it's not vastly more spacious. Like many other mid-size luxury sedans (the Jaguar XF, for example), the A6 doesn't put size above substance.
With an overall length of 193.9 inches, the A6 sits right in the middle of the mid-size sedan class. Interior space is slightly below par because Audi gives it a short trunk and a long nose, in an attempt to mirror classic sport-sedan proportions. That translates into slighted rear-seat and trunk space.
The A6's front seats are surrounded by fine head and leg room. Knee space is cut into by a wide center console. The seats are sculpted for long-distance comfor, and can be equipped with ventilation and heating. In back the A6 can tote two adults in reasonable comfort. Knee room is a bit shy for 6-footers, but it's better than in the related A7, which has small doors and a low roofline.
In-car storage isn't great. The console is shallow, the glove box too small, and the cup and bottle holders have Europe in mind, not big-gulp America. The trunk, at 14.1 cubic feet, is slight compared to the ginormous storage bins in a Taurus, at 20 cubic feet. The fold-down rear seats don't fold completely flat.
Where the A6 excels is in fit and finish and noise suppression. The cabin is quiet, tightly assembled, and feels appropriate to a price tag that can soar to $60,000 or more.