The 2013 Avenger can look deceptively small compared to some of the newer mid-size designs, with their elongated rooflines, but it's arguably about the same size as a Sonata or Optima.
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.
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 Avenger's trunk is on the small side of the scale, but we'd guess it to be large enough for most family needs.Ride quality is for the most part quite good in the 2013 Avenger; four cylinder models tend to ride better of the two, while V-6 models are a bit pitchier, yet quiet and refined in highway cruising.