The Hyundai Alpha series is a multi-valve gasoline inline four-cylinder engine family comprising 1.3, 1.4, 1.5, and 1.6L naturally aspirated versions and a 1.5L turbocharged version. Introduced in 1992, this was Hyundai's first engine designed entirely in-house. Design objectives were to provide high performance and good fuel economy with excellent durability at a reasonable cost. The first Alpha series engine developed and marketed was a 1.5L SOHC 12-valve inline-four. It was naturally aspirated and debuted in the 1992 Hyundai Scoupe. A 1.3L version debuted later in the Hyundai Accent.