The Alvis 12/50 was a series of cars introduced in 1923. The 12/50 was built in a variety of open or closed body styles, including two or four door options. These cars were powered by a selection of inline four engines, available in 1496cc, 1598cc, and 1645cc displacements. Early examples were available on the SA (short) or SB (long) platforms, but later in production, an improved SC platform was introduced. In 1926, the 12/50 received a substantial update, which included new TE, TF, TG, and SD variants. Production of the Alvis 12/50 lasted until 1932.