Arrol-Aster was a British car maker founded in 1927 when Arrol-Johnston and the English Aster company merged.

At first, manufacture of all the cars previously made by the two companies was continued along with those made under the Galloway badge but in 1928 a rationalisation was carried out. 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 company was responsible for making the body for Sir Malcolm Campbell's Blue Bird car in 1929 and an Arrol-Aster car was entered in the 1931 24 Hours of Le Mans.

Model range

• 1927-1930 Aster 21/60 3042 cc Straight-6 Overhead valve
• 1927-1930 Aster 24/70 3460 cc Straight-6 Sleeve valve
• 1927-1929 Arrol-Johnston 15/40 2413 cc Straight-4 Overhead valve
• 1927-1930 Arrol-Aster 17/50 2370 cc Straight-6 Sleeve valve
• 1929-1930 Arrol-Aster 23/70 3293 cc straight-8 Sleeve valve