Going by the measurements, the 2014 Ford Fusion is nearly a full-size sedan now, and the swoopy roofline doesn't result in a cramped interior or a lack of back-seat headroom. Overall, this is a package that works for four adults, a fifth in a pinch; and it's a well-organized, refined cabin in nearly every way.
The Fusion rides on a 112.2-inch wheelbase and is 191.7 inches long overall--placing it right in the middle of the 'new norm' for our ever-larger mid-size sedans. At 72.9 inches wide, the Fusion also has 44.3 inches of front-seat leg room and 38.3 inches of rear-seat leg room, while headroom checks in at 39.2 inches and 37.8 inches, respectively. The interior volume of 118.8 cubic feet is just a cube or so shy of the EPA's full-size hurdle; trunk space of 16 cubic feet is good, too.
Against any of the competition, the Fusion does a great job balancing between front and back seat space--thanks in part to thinner front seats. Comfort is great in power and manual seats, though on the manual seats there's a little too much front-end tilt to the bottom cushion for our tastes. Headroom is excellent, with a few inches to spare even for six-footers; and we recommend against the available sunroof. Despite the curvy profile, tall doors make entry and exit easy, as do rather high seat cushions. In back, as with the Nissan Altima and VW Passat, six-footers will make contact with the headliner.
In most of the test cars we've driven so far, the Fusion's panels and materials have been well fitted. and well chosen. The only exception is the piano-black gloss trim, either, since it scratches so easily--and the Fusion's cockpit wears a lot of it. Also, the base cloth upholstery has an inexpensive look, relieved only by the leather option. The dash cap is soft to the touch, though, and the switches and controls operate with precision, down to the soft, vibration-free thump of the doors as they latch closed.
Additionally, the interior is very well-hushed from road and engine noise--significantly better so than the Passat and Sonata.