To meet these requirements, the Austin Motor Company designed a new armoured car. The vehicle, known as Austin 1st series, was based on a passenger car chassis with rear-axle drive. Wheels were wooden, spoked, with pneumatic tyres and an additional set of wheels with full rubber tyres for use in combat was carried. Two Maxim machine guns were mounted in separate turrets placed on both sides of the hull behind the driver's cab. The vehicle was protected by armour plates 3.5–4 mm thick screwed to a body frame. The crew of four – commander, driver and two gunners – could enter or leave the vehicle via a door on the left side of the cab or via big two-leaf rear door. On 29 September 1914, 48 armoured cars were ordered. One car cost 1,150 pounds. After arrival in Russia the front and turret armour was replaced with 7 mm plates. First combat experience, however, revealed that the protection was still too weak and the vehicles were fully rearmoured at "Izhorski Works", Izhorsk. The improved armour made the Austins much heavier, resulting in limited mobility and occasionally in chassis damage. However, the car was still considered more successful than alternative designs by, among others, Armstrong Whitworth, Renault and Sheffield-Simplex.