BTR-141 (1947) – The original prototype with a faceted rear hull had two variants.
The first was armed with twin ZPTU-2 14.5 mm KPV heavy machine guns placed in a rotary platform with armour protection at the front and sides.
The second version had no permanent armament but later became the BTR-40.

BTR-40 (1950) – Original production model.

BTR-40A (1950) – BTR-40 converted into a SPAAG armed with twin ZPTU-2 14.5 mm twin anti-aircraft gun (2400 rounds) in a turret, later also used in the BTR-152A, manually operated by a single soldier.
The turret is placed inside the troop compartment.
It can make a full turn and its guns can elevate between -5 and +80 degrees.
This variant does not have the firing ports in the hull sides.

BTR-40V (1956) – BTR-40 fitted with an external tyre pressure regulation system.

BTR-40B (1957) – BTR-40V with an armoured roof with four hatches.
The vehicle has a filtering/ventilation system, NBC protection system and central tyre pressure regulation system.
It also has a pintle mount for a 12.7 mm or 14.5 mm heavy machine gun, although the standard version of the BTR-40B had no fixed armament.
It was designed for use as a reconnaissance vehicle.
Crew was reduced from 2 + 8 passengers to 2 + 6.

BTR-40Kh – NBC reconnaissance vehicle.

BTR-40ZhD (1959) – BTR-40 equipped with small rail wheels mounted to the front and rear of the vehicle on special supports.

BRDM-1 – Armoured car which uses a number of BTR-40 components.
Originally planned to be an amphibious variant of the BTR-40 and therefore it received the designation BTR-40P.
BTR-141 (1947) – The original prototype with a faceted rear hull had two variants. The first was armed with twin ZPTU-2 14.5 mm KPV heavy machine guns placed in a rotary platform with armour protection at the front and sides. The second version had no permanent armament but later became the BTR-40.
BTR-40 (1950) – Original production model.
BTR-40A (1950) – BTR-40 converted into a SPAAG armed with twin ZPTU-2 14.5 mm twin anti-aircraft gun (2400 rounds) in a turret, later also used in the BTR-152A, manually operated by a single soldier. The turret is placed inside the troop compartment. It can make a full turn and its guns can elevate between -5 and +80 degrees. This variant does not have the firing ports in the hull sides.
BTR-40V (1956) – BTR-40 fitted with an external tyre pressure regulation system.
BTR-40B (1957) – BTR-40V with an armoured roof with four hatches. The vehicle has a filtering/ventilation system, NBC protection system and central tyre pressure regulation system. It also has a pintle mount for a 12.7 mm or 14.5 mm heavy machine gun, although the standard version of the BTR-40B had no fixed armament. It was designed for use as a reconnaissance vehicle. Crew was reduced from 2 + 8 passengers to 2 + 6.
BTR-40Kh – NBC reconnaissance vehicle.
BTR-40ZhD (1959) – BTR-40 equipped with small rail wheels mounted to the front and rear of the vehicle on special supports.
BRDM-1 – Armoured car which uses a number of BTR-40 components. Originally planned to be an amphibious variant of the BTR-40 and therefore it received the designation BTR-40P.
BTR-40