Austin 15/20

The Austin 15-20 was the smaller-engined of an almost identical pair of cars announced by Herbert Austin in February 1906 with a full catalogue of specifications, the other being the 25-30. Unlike the 25-30 it came only with a live rear axle, not chain drive. Only four were made, and the 18-24 replaced it in 1907. The engine had four separately cast vertical cylinders with interchangeable inlet and exhaust valves, five crankshaft bearings, a separate crank-chamber casting and easily removable camshafts, adjustable valve gear and ignition timing even with the engine running, and an automatic governor on the throttle.