The 17/50 was an automobile made by Arrol-Aster from 1927 until 1929.

The car used a straight six, single sleeve valve engine of 2370 cc driving the rear wheels through a four speed gearbox. Suspension was by semi elliptic leaf springs at the front and cantilever springs at the rear.

A Cozette supercharger was an optional extra costing GBP50 giving the car a top speed of 72 mph (116 km/h) and an economy of 17 mpg-imp (17 L/100 km; 14 mpg-US).

The car had a distinctive two part V shaped windscreen and was available with saloon, open touring or coupé bodies.

In 1929, a car was entered into, and completed, the Monte Carlo Rally driven by the Hon Mmrs Victor Bruce, and two supercharged cars were entered for the 1929 RAC Tourist Trophy (TT) in Ulster driven by E.R. Hall and N. Garrard. Both cars crashed.

The saloon bodied car cost £435 in 1927, £550 in 1928 and £598 in 1929.

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