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Dodge St. Regis
The Dodge St. Regis was Dodge's short-lived full-size 6-passenger car that was produced from 1979-1981, and turned out to be Dodge's last true full-sized car as well. The St. Regis replaced the discontinued Monaco for 1979, but rode the same chassis dimensions as the Monaco, despite being an all-new R-body (the Monaco was a B-body). The St. Regis was introduced with Chrysler's all-new downsized New Yorker in 1979, and later in 1980 shared a body with Plymouth's re-introduced (in name only) Gran Fury.
The 1979 St. Regis was the most popular year of the "Saint Reej", but sales paled in comparison to GM's full-size cars (Chevy Impala/Caprice, etc), and also had to do with Ford's all-new downsized LTD and Mercury Marquis this year... the St. Regis was no match for either car, in sales, equipment offering, build quality (which was awfully crappy in those years). The St. Regis saw most of their sales, mostly police cars and taxi cabs