Even with a sunroof fitted (standard from GT-Line S), there’s enough head room and excellent leg room for those more than six feet tall. Storage space is also generous; there’s a large cubby beneath the front central armrest, space for two cups in front of that and, at the base of the dashboard, a further storage area that can be hidden from view by a soft-close sliding lid. All four door pockets and the glovebox are a decent size, too.
Head and leg room in the rear are less generous for taller adults, and a third rear passenger will be a proper squeeze, but it’s on a par with the Audi A5 Sportback and BMW 4 Series Gran Coupé in this respect. The Volkswagen Arteon’s rear seats feel palatial by comparison, though.
The Stinger's hatchback-style tailgate provides a wide opening for easy loading and, at 406 litres, the boot is big enough to take six carry-on suitcases. That’s not bad, but it's one less case than an A5 Sportback can fit and two less than the Arteon’s gargantuan boot will manage. If you need more room, you can drop the Stinger’s standard 60/40 split-folding rear seats – this provides a long, almost flat, extended load area.