Tilly (from "Utility") was the name given to a number of British military vehicles produced during WWII from civilian car designs and used by all of the armed forces in most theaters of that conflict. The chassis is the same size as Austin 10 saloon and it uses a "platform" construction that is the result of welding a pressed-steel floor to a frame, which results in great diagonal stiffness. But the military vehicle had a more powerful motor, additional water pump was added, as well as a bigger fuel tank and "cross-country" tires were used. About 30.000 vehicles were built.