A grand tourer (Italian: gran turismo) (GT) is a performance and luxury automobile capable of high speed and long-distance driving. The most common format is a two-door coupé with either a two-seat or a 2+2 arrangement.
The term derives from the Italian phrase gran turismo, a tribute to the tradition of the grand tour, used to represent automobiles regarded as grand tourers, able to make long-distance, high-speed journeys in both comfort and style.
The grand touring concept is eurocentric; the definition implies material differences in performance at speed, comfort, and amenities between elite automobiles and those of ordinary motorists. In post-war United States, the Interstate Highway System and wide availability of powerful Straight-six and V8 engines rendered the original meaning obsolete. European GT's did find success penetrating the American personal luxury car market, notably the Mercedes-Benz SL-Class.
Grand touring car design evolved from vintage and pre-World War II fast touring cars and streamlined closed sports cars.
Italy developed the first gran turismo cars. The small, light-weight and aerodynamic coupé, named the Berlinetta, originated in the 1930s. A contemporary French concept, known as Grande Routière, emphasized style, elegance, luxury and gentlemanly transcontinental touring, were often larger cars than the smaller Italian Gran Tursimos. Italian designers saw that compared to a traditional open two-seat sports car, the increase in weight and frontal area of an enclosed cabin for the driver and mechanic (or passenger) could be offset by the benefits of streamlining to reduce drag. Independent carrozzeria (coachbuilders) provided light and flexible fabric coachwork for powerful short-wheelbase fast-touring chassis by manufacturers such as Alfa Romeo. Later, Carrozzeria Touring of Milan would pioneer sophisticated Superleggera (super light-weight) aluminium bodywork, allowing for even more aerodynamic forms. The additional comfort of an enclosed cabin was beneficial for the Mille Miglia (Thousand Miles) road-race held in Italy's often wintry north.