The new car, which was displayed to dealers in February 1939, kept the 900 cc, four-cylinder, side-valve engine from the Big 7, now with a higher 6.5:1 compression ratio, but had a completely new chassis. This was halfway to full unitary construction in that the main member was a pressed steel floor pan with a box section welded down each side of the car with three others going across the floor. The body was then bolted to this structure. Suspension was by semi-elliptic leaf springs with hydraulic dampers.