Complex sentence: The Dodge Aspen and Plymouth Volaré were introduced in the fall of 1975 as 1976 models, and were collectively named Motor Trend's "Car of the Year" for 1976.
Split into simpler sentences: The Dodge Aspen and Plymouth Volare were introduced in the fall of 1975 as 1976 models. They were collectively named Motor Trend's "Car of the Year" for 1976.