Tier X Medium Tank Soviet Union

K-91

Tank ID 21761

Vehicle description

Wargaming Tankopedia

The vehicle was developed by the Design Bureau of the Army Engineering Committee under the supervision of A. F. Kravtsev from March through August 1949. The tank was supposed to position a driver in the fighting compartment, as well as feature a 100 mm gun with an automatic loading system, and coaxial large-caliber machinegun. The plan was to mount the 12-cylinder opposed-piston turbo-diesel engine. The mounting brackets with ski-shaped supports were used as support rollers. Development of the project was discontinued at the blueprints stage in December 1949.

Description from the Wargaming Tankopedia · Language selected automatically

Technical profile

Standard configuration

Hit points

1,950

Weight

45.0 t

Forward speed

55 km/h

Reverse speed

20 km/h

View range

410 m

Signal range

730 m

Armour

	Front	Sides	Rear
Hull	140	60	45
Turret	220	140	60

Engine: V-64 · 860 hp

Radio: R-113

Armament

Standard gun and ammunition

100 mm D-46T

Calibre 100 mm

Reload time 5.7 s

Aiming time 1.7 s

Dispersion 0.33

Rate of fire 10.53 /min

Ammo capacity 50

Shell types

APCR · composite rigid Damage 240 / 320 / 400

Penetration 207 / 276 / 345 mm

HEAT · shaped charge Damage 240 / 320 / 400

Penetration 248 / 330 / 413 mm

HE · high explosive Damage 315 / 420 / 525

Penetration 38 / 50 / 63 mm

Marks of Excellence

Damage thresholds

Combined Damage (Damage + Assist + Tracking)

Combined damage

1 Mark ≥ 65 %

2,951

2 Marks ≥ 85 %

4,292

3 Marks ≥ 95 %

5,544

Approximation based on WN8 expected values — not an official Wargaming figure.

WN8 Expected Values

XVM reference

XVM Expected Values for WN8 calculation (per battle)

Per battle (avg.)

Avg. damage 1,788

Avg. spotted 1.11

Avg. kills 0.98

Avg. defence 0.75

Exp. win rate 49.54 %

Community stats

Measured, not estimated

Average across every profile stored on WG-Watch — real battles instead of expected values.

Win rate

55.72 %

Avg. WN8

2,577

Battles

20,801

As of Aug 31, 2026

Rank 62 of 110 at Tier X

Best players on this tank

By WN8

From the stored profiles, minimum 50 battles on this vehicle. Updated daily.

#	Player	WN8	Battles	Win rate
1	Baby eu	5,665	76	73.68 %
2	Rasierer32 eu	5,570	86	67.44 %
3	Dualistiq eu	5,380	74	70.27 %
4	PierreNoire67 eu	5,331	99	71.72 %
5	moimoi12_FIN eu	5,156	518	69.69 %
6	iyouxin eu	5,150	61	73.77 %
7	Alfazet eu	4,964	129	62.79 %
8	Gugugi eu	4,778	218	64.22 %
9	EvilQuintessence eu	4,770	171	62.57 %
10	mailand eu	4,761	178	65.73 %