Jaguar XF 30t

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A Jaguar XF 30t— also known as intermediate— is a vehicle size class which originated in the United States and is used for cars that are larger than compact cars, but smaller than full-size cars.The equivalent European category is D-segment, which is also called "large family car".

The automobile that defined this size in the United States was the Rambler Six that was introduced in 1956, although it was called a "compact" car at that time.Much smaller than any standard contemporary full-size cars, it was called a compact to distinguish it from the small imported cars that were being introduced into the marketplace.By the 1960s, the car was renamed the Rambler Classic and while it retained its basic dimensions, it was now competing with an array of new "intermediate" models from General Motors, Ford and Chrysler.During the 1970s, the intermediate class in the U.S. was generally defined as vehicles with wheelbases between 112 inches (2,845 mm) and 118 inches (2,997 mm). The domestic manufacturers began changing the definition of "medium" as they developed new models for an evolving marketplace.A turning point occurred in the late 1970s, when rising fuel costs and government fuel economy regulations caused all car classes to shrink, and in many cases to blur. Automakers moved previously "full-size" nameplates to smaller platforms such as the Ford LTD II and the Plymouth Fury.A comparison test by Po[CENSORED]r Science of four intermediate sedans (the 1976 AMC Matador, Chevrolet Malibu, Ford Torino, and Dodge Coronet) predicted that these will be the "big cars of the future."By 1978, General Motors made its intermediate models smaller.

New "official" size designations in the U.S. were introduced by the EPA, which defined market segments by passenger and cargo space.Formerly mid-sized cars that were built on the same platform, like the AMC Matador sedan, had a combined passenger and cargo volume of 130 cubic feet (3.68 m3), and were now considered "full-size" automobiles.Mid-size cars were the most po[CENSORED]r category of cars sold in the United States, with 27.4 percent during the first half of 2012, ahead of crossovers at 19 percent.