T-34/85

1944 - Soviet T34/85 Medium Tank
Armament: 1 - 85mm gun model 1944 caliber 53
1 - turret mounted 7.62 DT MG
1 - hull mounted 7.62 DT MG
Engine: V-12 diesel, 500hp
Speed: 34 mph
Range: 115 miles
Crew: 5
Weight: 32 tons

Later variant with larger 85mm gun required a redesigned turret.
The new turret was roomy enough for a third crewman in the turret to
handle loading of the gun. A cupola for the commander was added.
Electric turret traverse was added. Still in service with many armies
today.This tank achieved a tremendous increase in firepower with
little additional weight. The new gun was the equal of the German
88mm KwK.
Over 50,000 produced.

This is probably my favourite Tank ever and in my viewpoint the greatest because even after 51 years it is still in use by today's Indian Army. This tank held the Blitzkrieg at bay because of it's diesel engine. While the Germans froze in the harsh Russian winter the Soviet tanks rolled on.

1993 Soviet T-90 MBT

1993 - Soviet T-90 MBT
Armament 1 - 125mm 2A46M-2 smooth bore stabilized gun
1 - 7.62mm MG coaxial
1 - 12.7mm AA MG
Engine: Model 84V-84, multi-fuel, 840 hp
Speed: 40 mph
Range: 310 miles
Crew: 3
Weight: 46 tons

Derivative of T-72 line, with low silhouette advanced armament and fire
control system. Most modern tank currently in service with the Russian
Army. Skirts cover the sides of the tank. The Glacis is sloped and
covered with second generation ERA blocks (KONTAKT-5). The main gun
can fire the AT-I I Sniper laser guided missile, accurate at long
range. Two IR searchlights are mounted next to the main gun as part
of the Shtora ATGM system. Turret is covered with second generation
ERA bricks giving a clam shell appearance. The T-90 is also equipped
with the TShU-1-7 Shtora-1 IR jamming system. This is one of the
best protected MBTs in the world. It has been selected by the Indian
Army.