The Austin 30 hp was the top model which was produced by the Austin Motor Co. during the early years of the First World War.
The car appeared in the first year of the war in 1914 as a successor to the model 50 hp as a touring car (on the short chassis) and Pullman limousine (on the long chassis).
The side-valve four-cylinder engine had the cylinder of the model 18/24 hp. 111 mm bore diameter and the crankshaft with the largest ever realized in Austin stroke of 152 mm This resulted in a displacement of 5883 cm³.
In late 1916, the production of this model has been discontinued without a successor.