Tier VIII Tank Destroyer Poland

SDP wz 66 Grom

Grom

Tank ID 51857

Vehicle description

Wargaming Tankopedia

The SDP wz 66 Grom, a tank destroyer from the late 1950s to early 1960s, was designed taking into account Soviet experience of developing similar vehicles. The armor was meant to withstand attacks from existing and potential NATO tanks, and a gas-turbine engine was planned to increase mobility. As armament, several types of guns were considered, including so-called deep-rifled ones. It was not possible to implement some of the ideas due to the technological restrictions of the time. All of the concepts went no further than blueprints.

Description from the Wargaming Tankopedia · Language selected automatically

Technical profile

Standard configuration

Hit points

1,300

Weight

51.0 t

Forward speed

45 km/h

Reverse speed

15 km/h

View range

350 m

Signal range

730 m

Armour

	Front	Sides	Rear
Hull	100	70	40
Turret	–	–	–

Engine: 2x GTD-F · 810 hp

Radio: R-123M

Armament

Standard gun and ammunition

GG-100/162 mm K

Calibre 100 mm

Reload time 16.0 s

Aiming time 2.7 s

Dispersion 0.40

Rate of fire 3.75 /min

Ammo capacity 40

Shell types

APCR · composite rigid Damage 600 / 800 / 1,000

Penetration 204 / 272 / 340 mm

APCR · composite rigid Damage 600 / 800 / 1,000

Penetration 222 / 296 / 370 mm

HE · high explosive Damage 600 / 800 / 1,000

Penetration 60 / 80 / 100 mm

Marks of Excellence

Damage thresholds

Combined Damage (Damage + Assist + Tracking)

Combined damage

1 Mark ≥ 65 %

2,361

2 Marks ≥ 85 %

3,434

3 Marks ≥ 95 %

4,436

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 1,431

Avg. spotted 0.95

Avg. kills 0.95

Avg. defence 0.48

Exp. win rate 53.10 %

Community stats

Measured, not estimated

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

Win rate

57.60 %

Avg. WN8

2,660

Battles

12,580

As of Aug 31, 2026

Rank 36 of 228 at Tier VIII

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	iyouxin eu	4,987	108	74.07 %
2	Baby eu	4,805	95	69.47 %
3	Thraximundurabrask na	4,745	181	66.30 %
4	Dualistiq eu	4,668	128	64.06 %
5	moimoi12_FIN eu	4,550	161	72.67 %
6	skill4ltu eu	4,234	162	59.88 %
7	ShadeWitcher eu	4,126	159	61.01 %
8	NewMultiShow eu	4,123	218	62.84 %
9	Quickfingers eu	4,083	51	49.02 %
10	damianos2003 eu	3,629	126	57.14 %