The Volvo PV is a series of two-door, four-passenger car models — the PV444 and the PV544 — made by Volvo from 1947 to 1965. During World War II's early stages, Volvo decided that a new, smaller car that could deliver good fuel economy would assure the company's future. A raw materials shortage during the war drove home the point that an automobile should be smaller, and also complicated Volvo's ability to mass-produce the product. In 1944, when the car was finally introduced to a car-hungry public, response was very positive and orders poured in from the Swedish population. It was another three years though, until 1947, before series production began. The PV quickly earned a reputation for being strong and rugged, although the design was considered outdated from early on. The PV also competed successfully, in the American SCCA class but also internationally, with a second-hand PV544 memorably winning the Safari Rally in 1965. No PV 544 were produced in 1966. Last production was October 1965, some were sold in 1966 and titled as such, but last model year is 1965. PV444 The PV444 was Volvo's first unibody car. Its body structure was influenced by the 1939 Hanomag 1.3 litre, which was purchased and studied by Volvo engineers. It was also the first Volvo in almost 20 years to come with a four-cylinder engine (earlier models had used side-valve straight sixes). The first PV444s were powered by 40 PS 1.4 L inline-four engines designated B4B, with three main bearings, overhead valves, and a single downdraft carburettor. The power of this engine increased to in October 1950, and to in October 1955. US models, beginning to appear in early 1956, received an up-rated version called the B14A, which was given twin side-draft 1½ in SU carburetors for a total of 70 hp. Most early US sales were limited to Texas and southern California. American customers also had the option of European delivery, in which case they could also get a cheaper model with the basic B4B engine. By the 1957 model year, engine displacement was increased to 1.6 L and both single downdraft- B16A and twin side-draught carburetted B16B versions were offered. PV544 In 1958, the PV544 was phased in. Subtle differences with the PV444 included the introduction of a curved one-piece windshield to replace the two panes of flat glass, larger taillights, and a ribbon-type speedometer. The 444's three-speed