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K-91 — Tier IX Soviet heavy tank

K-91

IX
Competes with

Parameters

Compare tank's parameters with others from:
2050
HP
9 / 17
288.2m
View range
1 / 17
Firepower
Shell
2737
DPM
1 / 17
248
Penetration
9 / 17
350
Damage
17 / 17
135
Devices/crew damage
17 / 17
1050
Burst damage
3 / 5
1535
Velocity
1 / 17
2.42%
Penetration loss over distance
4 / 17
Explosion radius
— / —
2346
DPM
1 / 17
310
Penetration
14 / 17
300
Damage
17 / 17
135
Devices/crew damage
17 / 17
900
Burst damage
3 / 5
900
Velocity
16 / 17
%
Penetration loss over distance
— / —
Explosion radius
— / —
3285
DPM
2 / 17
50
Penetration
17 / 17
420
Damage
17 / 17
135
Devices/crew damage
17 / 17
1260
Burst damage
3 / 5
900
Velocity
14 / 17
%
Penetration loss over distance
— / —
1.76
Explosion radius
17 / 17
DPM
— / —
Penetration
— / —
Damage
— / —
Devices/crew damage
— / —
Burst damage
— / —
Velocity
— / —
%
Penetration loss over distance
— / —
Explosion radius
— / —
100.0
Caliber
17 / 17
7.82
Rate of fire
1 / 17
Reload time
— / —
15.96
Magazine reload time
1 / 4
Time to load next shell
— / —
3×1
Magazine size
1 / 5
3.53
Time before next shell is ready
3 / 5
Gun handling
2.04
Base aim time
2 / 17
0.319
Dispersion
2 / 17
Dispersion factors
0.200
When moving
10 / 17
0.200
When rotating
10 / 17
0.100
When rotating turret
2 / 17
4.000
After shot
7 / 17
Gun angles
7°
Depression
11 / 17
10°
Elevation
14 / 17
180°/180°
Aiming arc (left / right)
1 / 17
22.34
Turret traverse speed
11 / 17
Mobility
61.31
Weight
5 / 17
Speed
40
Forward
5 / 17
15
Backward
4 / 17
Effective Power / Weight ratio
13.37
On hard terrain
10 / 17
10.90
On medium terrain
12 / 17
8.17
On soft terrain
11 / 17
Traverse speed
34.75
On hard terrain
6 / 17
28.31
On medium terrain
9 / 17
21.23
On soft terrain
7 / 17
6.43m×3.30m×1.80m
Size
4 / 17
Concealment
13.20%
While still
5 / 17
7.60%
While moving
5 / 17
3.72%
Upon firing while still
10 / 17
2.86%
Upon firing while moving
10 / 17
Spotting distance by enemy with view range of 282m
251.4m
While still
264.4m
While moving
273.4m
Upon firing while still
275.4m
Upon firing while moving

Armor profile

Click or tap on the image to see 3D model
Primary armor
  • 328–410
  • 246–328
  • 164–246
  • 82–164
  • 0–82
Spaced armor
  • 288–360
  • 216–288
  • 144–216
  • 72–144
  • 0–72
Weak
Strong
Chances of getting penetrated from 100m distance by average tank of given type:
  • — less than 30%
  • — between 30% and 70%
  • — more than 70%

Armor performance

Based on tank position, enemy tank type and shells
In battle vs:
Head on
AP
APP
HE
HEP
AP
APP
HE
HEP
AP
APP
HE
HEP
From the side
AP
APP
HE
HEP
AP
APP
HE
HEP
AP
APP
HE
HEP
From the back
AP
APP
HE
HEP
AP
APP
HE
HEP
AP
APP
HE
HEP
Historical Reference

This tank was designed in March-August 1949 at OKB IK SV (Special Design Bureau of Engineering Committee of Ground Forces) under the direction of A.F. Kravtsev. As per the design, the tank was planned to feature the driver's seat in the fighting compartment, a 100 mm gun with an autoloader, and a large-caliber coaxial machine gun. The power unit was represented by a 12-cylinder opposed turbo diesel engine. Ski-shaped mountings were to perform the task of support rollers. The K-91 design did not move past the draft stage, and its development stopped in December 1949.