For its final year in 1960, the Adventurer lost its convertible but gained a four-door hardtop and sedan. Instead of being a limited edition model, the Adventurer was the top trim model range for the two series DeSoto line-up for 1960. Ram induction was reintroduced on models with the quad-four carburetor. This was also the only year that car came in variety of colors instead of its traditional white-black and gold combination. Total sales for the Adventurer line posted its best effort with 11,597 models produced.
But rumors surrounded DeSoto that Chrysler was ready to kill the brand and customers reacted by buying other brand cars. Also hurting DeSoto was its design, almost exactly like that of Chrysler, save for the grille and the blade styled tail lights, also drove consumers into Chrysler showroom where they bought the almost identical Chrysler Windsor without the fear that it would be an orphan like the DeSoto was bound to be, and soon. New was dual speed rear window defoggers, the Hiway Hifi that played RCA 45rpm records, and Unibody construction.
In its final year of 1961, DeSoto would offer a single car line, offered in two body styles. Chrysler announced the end of DeSoto in November 1960, with production lasting just long enough to deplete supplies of DeSoto trim on hand.
Source: Wikipedia, 2012