The 2012 Dodge Avenger has roughly the same interior space found in the Hyundai Sonata, or in the latest Ford Fusion or Subaru Legacy, which amounts to a roomy cabin in front or in back--although the Avenger's tall beltline can make the back seat feel claustrophobic to some.
With flat, rather wide front seats, as well as plenty of headroom and legroom, there's space for a wide range of body type, but a lack of side support. Back seats are a bit flat, but contoured like those of most other mid-sizers, with enough legroom for adults and just enough headroom--although you might need to bow your head for entry and exit. The Avenger's trunk is on the small side of the scale, but we'd guess it to be large enough for most family needs.
But the Avenger's tall shoulders and high beltline--designed to mimic those of the larger Charger to some degree--definitely have their cost, making the back seat more of a Dramamine zone than the back seat in sedans with a taller, airier greenhouse, like a Sonata. Dark trim most everywhere inside save for the upholstery enhances the more confining feel.
The 2012 Dodge Avenger rides well, for the most part, with four-cylinder models soaking up more bumps; V-6 models stand as impressively quiet and refined for highway cruising.