Dodge's replacement for the Dart was the Aspen, introduced in mid-1975 as a 1976 model. This new design featured lighter weight resulting in slightly improved fuel economy; it also had more interior and trunk room than the Dart. Front suspension was a new design; it featured transverse-mounted torsion bars which not only improved ride, but cornering as well. Its boxy styling gave the impression of a larger car. However, sales had to be shared with the virtually identical Plymouth Volare. Both cars were available in coupe, sedan, and station wagon body styles, and in both base and deluxe trim. Despite its virtues, customers soon found out about the Aspen's rush to market when they saw their cars experience severe body rust within a couple of years on the road; engine and drive train problems plagued the Aspen/Volare twins, and although the problems were largely worked out within a few years, the final Aspens were the 1980 models. This car was available with either a 225 cubic-inch Slant Six or a small block V8 displacing 318 or 360 cubic inches.