1926 AC 12/24 Royal roadster 24 bhp, 1,496 cc SV inline four-cylinder engine with two valves per cylinder, three-speed manual transmission, live front and rear axles with quarter-elliptic leaf-spring suspension, and rear-wheel mechanical drum brakes. Wheelbase: 105 in. By 1907, Autocars and Accessories Ltd. had reorganized as Autocarriers Ltd., which continued until 1921, when well-known British motoring entrepreneur Selwyn F. Edge gained control of the firm. Founders John Weller and John Portwine resigned, and Edge proceeded to rename the company AC Cars Ltd., the name by which it would continue to produce automobiles for decades to come.

In 1926, most AC products were powered by the two-liter, six-cylinder, overhead-cam engine that Weller had designed in 1919 and which the company would produce with continual improvements until 1963. The 12/24 was an exception, as it was powered by a 1,496-cubic centimeter, side-valve, four-cylinder engine that was supplied by well-known British motorcycle manufacturer Anzani. This would be the final year that a four-cylinder model was available, but with peppy performance and attractive design, no one could say that it did not go out with a “bang.” ( from the www.RMAuctions.com )