Chrysler Fifth Avenue
Overview
 
With the R-body
Chrysler R platform
The Chrysler R platform, introduced for 1979, was essentially a slightly modernized version of Chrysler's 1971-78 intermediate B platform, which had its roots in the company's downsized 1962 full-size models . It was a response to the downsized 1977 Chevrolet Caprice and Ford LTD, but proved...

 out of production and the LeBaron name transferred to the Chrysler K platform
Chrysler K platform
The Chrysler Corporation's K-cars were compact-to-midsize cars designed to carry six adults on two bench seats and were aimed not only to replace Chrysler's nominally-compact F-body Aspen and Volaré, but also to compete with intermediates like the Chevrolet Malibu and Ford Fairmont...

 for 1982, the New Yorker was downsized once again, becoming a mid-sized car (although it was built upon Chrysler's largest remaining platform).

The Fifth Avenue option was still available as a $1,244 option package. It was adapted from the earlier LeBaron's package, with a distinctive vinyl roof, electro-luminescent opera lamps, and a rear fascia adapted from the Dodge Diplomat, albeit modified.
 
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