BMC ADO17 is the model code used by the British Motor Corporation (BMC) for a range of large family cars manufactured from September 1964 to 1975. The car was initially sold under the Austin marque as the Austin 1800, then by Morris as the Morris 1800, by Wolseley as the Wolseley 18/85, and later the Austin 2200, Morris 2200 and Wolseley Six. The 1800 was voted European Car of the Year for 1965.

The 2.2-litre straight-six engine used in the Australian Austin Tasman & Kimberley "X6" cars was introduced into the British ADO17 range in 1972. The British 6-cylinder models were marketed as the Austin 2200, Morris 2200 and Wolseley Six.

In early 1975, all the ADO17 models were replaced by the wedge-shaped ADO71, or 18–22 series, which bore the Austin and Morris (1800 and 2200) names, while the Wolseley variant had no official model name save for being marketed as "the Wolseley saloon". From late 1975, all ADO71 models were marketed under the Princess name and the Wolseley marque was discontinued.