The Subject (Source - Wikipedia)
The heavy Panzerspähwagen was a large but very fast and highly versatile addition to the German Army. The original 6-Rad (six wheel) versions were based on a 6x4 truck with an armoured body, but by 1937 they were being replaced by 8-Rad versions. During the replacement phase, the Sd.Kfz. (Sonderkraftfahrzeug, 'special vehicle') numbers were carried directly over; differentiation was made by the inclusion of 6-Rad or 8-Rad in the vehicle's name.
The Sd.Kfz. 232 was armed with a 20 mm KwK 30 L/55 autocannon. This cannon was based on the 20 mm FlaK 30 anti-aircraft gun, and was capable of firing at a cyclic rate of 280 rounds per minute.