Could this be the light car manufactured by A. V. Roe and Co (Avro), the aircraft makers? I haven't been able to locate any pictures or model numbers, but I understand that it was powered by a 1,330 cc 4-cylinder engine, and was produced during the 1920's (only about 100 manufactured). This is not to be confused with the two and three wheeled Avro models, of the same time period, which have appeared earlier on AutoPuzzles.