The 2014 Infiniti Q50 is about the same size as the outgoing G Sedan—although thanks to some rejiggering of the space inside, there are better provisions for those in back, as well as much more comfort and quiet for everyone.
The Q50's seats benefit from some of the thought that went into those in the latest Nissan Altima--pressure is distributed more evenly, for long-distance comfort. All the Sport models come with extendable thigh bolsters for the driver—a feature that helps tremendously in getting taller drivers long-range comfort.
For more interior space in back, Infiniti says it's slimmed down the front seatbacks and increased front-seat travel and height adjustment. Infiniti managed to fit a few more inches of rear legroom in—through the use of a thinner front-seat design and, for an easier time getting feet in and out, a side pillar that’s in a slightly different place. That said, headroom is still quite limited, and we'll venture to guess that most six-footers will be rubbing the headliner.
Trunk space is boosted to 18 cubic feet on the non-hybrid Q50, while the hybrid loses 3.9 cubic feet to battery pack storage. Hybrids have pretty much the same packaging, but they can’t be specified with the split-folding rear seat.
The Infiniti InTouch system comes with a lower seven-inch touch screen and an upper eight-inch one. The upper screen can also be controlled via a slightly different version of Infiniti’s rotary/button controller. Infiniti has made many of the controls in the Q50 redundant; although some convenience features, like the heated steering wheel, require going into a proper screen.
In terms of refinement and quiet, the Q50 is much improved versus the previous G model; it's now on par with German rivals for comfort and isolation, and engine noise is well-muted except when accelerating rapidly.