In the first quarter of 1987, development began on a redesign codenamed “EN53”. The Ford Crown Victoria was unveiled on November 28, 1990 and began production in January 1991 as a 1992 model, launching on March 21, 1991. Fleet sales of the vehicle were postponed for 14 months to maximize availability for buyers at launch. In line with the redesign of the 1991 Chevrolet Caprice (its chief competitor), the 1992 Crown Victoria featured a major exterior redesign while retaining the previous-generation chassis. Ford reduced the coefficient of drag of the exterior from 0. 42 to 0. 34 (nearly matching the 0. 32 of the Ford Taurus) to enhance aerodynamics and fuel efficiency, giving the first generation Crown Victoria its sleek, wedge-shaped design that would come to be known as the “Aero” look.