There’s an interesting if disjointed (and sometime wrongly-captioned) photo essay on armored cars at this link:
[W]e take a look at the many different types of armoured cars that have appeared over the last one hundred years.
The armored wheeled vehicles range from the First World War’s Bristols and Rolls-Royces, up through the Russian Civil War’s Austin-Putilov…
…and many peculiar armored reconnaissance and scout vehicles of the interwar years, World War II, and the Cold War. Heavy on Russian stuff. There’s even a shot of Stalin’s own ZIS armored limousine, which looks like a Packard for the simple reason that the financially strapped Packard firm sold the USSR a lot of the tooling.
The wartime German types, which survived at very low rates, are underrepresented, but a lot of the interwar and Spanish Civil War Soviet types are depicted, as is the wartime the BA-64, which always makes us think (1) for an armored car, that’s cute as kittens, and (2) what a horrible place to die! It had angled armor, like the contemporary German designs.
Most of these things had 12-15 mm of armor (half to three-quarters of an inch) and were barely proof against small arms and artillery wide misses. (Even against those minor battlefield threats, the pneumatic tires were vulnerable to an easy mobility kill).
An example of the kinds of subtle errors in the photo essay is its description of this early postwar Czech armored car, the Škoda PA-II “Želva”:
The post says this of it:
We’ll start with perhaps the most interesting – a streamlined armored car: “Built by Skoda in 1923 and armed with 4 Maxim MGs, this Zelva served with the Czechoslovak police, and weighed more than 7 tons”:
Actually they missed its most interesting feature, one which fascinated the Germans: it had two driver’s stations and was equally at home going either way. They also called the MGs wrong, in our humble opinion. The image on the left seems to show the characteristic long flash hider and short water jacket of the Austrian-designed Schwarzlose, a mechanically unique gun that was used by the Czechoslovak Republic for some years after independence (they even developed improvments over the wartime gun). And indeed, a better reference on the Želva online spills important details: only 12 were made, the armor peaked at under a quarter-inch, and the Czechoslovak Army rejected them… and, oh yeah, the armament was 4 each, 7.92 mm Schwarzlose vz. 07/24 machine guns. The Germans took them over and used them as radio vehicles during the war. None are believed to survive.