The Astral 12/40 was a car built by Hertford Engineering Co Ltd, Barking, Essex, UK, from 1923 to 1924. The number made is not known.

Although it was short-lived, it had many advanced features. The engine, made in-house, was a 1720 cc 4-cylinder with single overhead camshaft and the car had brakes on all four wheels. The cars had a cone gear box and a three speed gearbox.

The wheelbase was 9ft long with semmi-elliptical springs on all four corners. The 12/40 had a top speed of 75mph (121kmh).

It cost £365 for a two-seater and £375 for a four/five-seat tourer.