Arrol-Aster was a British car maker founded in 1927 when Arrol-Johnston and the English Aster company merged.
The Wembley, London works of Aster was closed and production concentrated at the Heathhall, Dumfries factory of Arrol-Johnston.
The cars were complex and expensive and sales were poor resulting in the company going into receivership in 1929 and finally closing in 1931.
The 17/50 used a straight six, single sleeve valve engine of 2370 cc driving the rear wheels through a four speed gearbox.
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)[2] The car had a distinctive two-part, V-shaped windscreen and was available with saloon, open touring or coupé bodies.