M-91 "Vihor" ("whirlwind")

M-91 Vihor prototype tank that was based on the M-84 tank.

M-91 was designed in the 1980s as an advanced tank to replace older models, but its development halted due to the Yugoslav wars.

• 125 mm 2A46M smoothbore gun (40 rounds)
• Coaxial 7.62 mm PKT, 12.7 mm NSVT turret-mounted
• Front hull: 500-650 mm RHA equivalent, optional KAO M-99 ERA
• NBC protection, smoke dischargers (BDK system, 24 units)

Vihor M-91 specifications:

• Dimensions (L-W-H) 9.74 x 3.65 x 2.21 m
• Total Weight, Battle Ready 44 tonnes
• Crew 3 (driver, commander, and gunner)
• Propulsion 1,200 hp​​ V-46-TK-1
• Speed/off-road 75 km/h, 50 km/h
• Range 600 to 700 km
• Armament 125 mm 2A46, One 7.62 and one 12.7 machine gun.
• Armor Equivalent up to 500 to 650 of homogeneous armor
• Number built At least three incomplete prototypes

After the war, the project served as basis for the following upgrades to M-84 Croatian, M-95 Degman and Serbian M-84AS1.