Stretching the basic front-drive New Yorker's platform by five inches produced twin luxury models, introduced for the 1990 season. Imperial was the showboat "flagship" of the new full-size 4-door sedan duo, four inches longer than the New Yorker overall but on the same wheelbase. The difference in length is mainly in the body's front and rear overhang. In their first year, each model carried a 147-horsepower, 3.3-liter V6 with 4-speed automatic transmission. Both cars were well-equipped, including highline trim inside and out, automatic rear load leveling, power windows and door locks, heated power mirrors, and an automatic climate-control system.