gun, which resulted in the Sd.Kfz. 234. The Sd.Kfz. 234's 50 mm gun could penetrate and knock out Allied armoured cars and light tanks, but this was not the vehicle's role. The role intended was for the car's armour to protect the crew from small arms fire during reconnaissance missions. Using high explosive ammunition, the 20 mm autocannon was highly effective against infantry and unarmoured vehicles. Great success was also achieved by replacing the regular armour-piercing explosive ammunition with Armour Piercing Composite Rigid rounds, but this ammunition was in chronically short supply. Propulsion Production versions of the Sd.Kfz. 232 were fitted with a , eight-cylinder Büssing-NAG L8V-G petrol engine, which gave a top speed of and a range of . Crew A crew of four was typical. The commander and gunner sat in the turret. The Sd.Kfz. 232 employed an unusual dual driver arrangement, with one driver seated at each end of the vehicle. This allowed the vehicle to be driven in either direction (forward or backward) with equal ease. Six wheelers All 6-rad versions were produced from 1932 to 1937. Sd.Kfz. 231 The first of the German armoured cars, the Sd.Kfz. 231 was based on modified Daimler-Benz, Büssing or Magirus 6x4 truck chassis. The 231 was armed with a 2 cm KwK 30 L/55 autocannon, and a Maschinengewehr 13 machine gun. It had a second driver's position in the rear so that the vehicle could be driven either forwards or backwards with relative ease. The 231 was introduced into service in 1932 and began to be replaced in 1937 when the German Army switched production to 8-wheeled armoured cars instead of 6-wheeled. Despite being replaced, they were used by ('reconnaissance') units during the Invasion of Poland, the Battle of France, and the invasion of the USSR. They were withdrawn afterwards for use in internal security and training. The crew consisted of a commander, gunner, driver, and a radio operator/rear driver. Sd.Kfz. 232 The 232 carried a Fu.Ger.11 SE 100 medium-range and a Fu.Spr.Ger.A short-range radio. This model was very distinctive because of the heavy "bedspring" antenna over most of the hull. This antenna was supported by two insulated vertical connecting tubes at the back corners and an inverted U-shape tube construction on the turret sides with a central joint that allowed the turret its full 360° traverse. Sd.Kfz. 263 This was a radio vehicle, , equipped with extra long-range