{{Short description, none ''This list contains combat vehicles which never left the design phase or had an extremely limited production (usually < 10).''

Australia

* Australian Cruiser Tank Mark 3 "Thunderbolt" * Australian Cruiser Tank Mark 4 *

Rhino Heavy Armoured Car Car, Armoured, Heavy (Aust), also known as Rhino, was an armoured car designed in Australia during the Second World War. Due to enemy action and design problems the project never got beyond a prototype stage. History At the outbreak of the Se ...

Australian experimental light tank The Australian Experimental light tank (AELT, and also known as "Chassis 160") was a prototype light tank built by Australia during World War II, using a local pattern carrier hull. It was one of two indigenously developed tank designs, the othe ...

Canada

Skink anti-aircraft tank Tank AA, 20 mm Quad, Skink was a Canadian self-propelled anti-aircraft gun, developed in 1943–44, in response to a requirement from the First Canadian Army. Due to a lack of threat from the German , the Skink was cancelled in 1944 after ...

Germany

Entwicklung Series The ''Entwicklung'' series (from German ''Entwicklung'', "development"), more commonly known as the E-Series, was a late-World War II attempt by Nazi Germany to produce a standardised series of tank designs. There were to be standard designs in ...

Entwicklung series, a comprehensive redesign of German armor from small tracked vehicles to a 100-ton super-heavy tank. Only a single E-100 chassis was completed *

Leichttraktor The ''Leichttraktor'' (Vs.Kfz.31) was a German experimental tank designed during the Interwar Period. History After the end of World War I, Germany was restricted in military development by the Treaty of Versailles. However, a secret program ...

, pre-war light tank, four built *

Neubaufahrzeug The German Panzerkampfwagen Neubaufahrzeug ("new construction vehicle"—a cover name), abbreviated as PzKpfw Nb.Fz, series of tank prototypes were a first attempt to create a medium tank for the Wehrmacht after Adolf Hitler had come to power. M ...

, pre-war heavy tank design, five built *

Panther II The Panther II tank, a German tank-design proposal of the Second World War, was based on the design of the Panther tank. It had slightly thicker armour than the Panther and adopted some standardised components from the Tiger II tank design. ...

, development of the Panzerkampfwagen V "Panther". A single chassis was built * Panzerkampfwagen VII "Löwe", a super-heavy tank project that never reached prototype stage * Panzerkampfwagen VIII "Maus", a super-heavy tank. Two prototypes built * Panzerkampfwagen IX & Panzerkampfwagen X Paper project *

Landkreuzer P. 1000 Ratte The ''Landkreuzer'' P. 1000 "Ratte" (English: ''Land Cruiser P. 1000 "Rat"'') was a design for a 1000-ton tank to be used by Nazi Germany during World War II which may have been proposed by Krupp director Edward Grotte in June 1942, who had alr ...

; paper project *

Landkreuzer P. 1500 Monster The ''Landkreuzer P 1500 Monster'' was a purported German pre-prototype super-heavy self-propelled gun designed during World War II. While it is mentioned in a number popular works about World War II projects, there is no solid documentation f ...

; paper project * 12.8 cm Selbstfahrlafette auf VK 30.01(H) "Sturer Emil" - tank destroyer; 2 built *

Heuschrecke 10 The Heuschrecke 10 ( en, Grasshopper 10) was a German prototype self-propelled gun and ''Waffenträger'' (English: "Weapon carrier") developed by Krupp-Gruson between 1943 and 1944. The official designation of the vehicle was ''105 mm le ...

, Krupp's design for a new self-propelled artillery gun *

VK 3001 (P) The VK 30.01 (P) was the official designation for a heavy tank prototype proposed in Germany. Only two prototype chassis were built. The tank never entered serial production, but was further developed into the VK 45.01 Tiger (P). Porsche calle ...

- medium tank; paper project *

VK 3002(DB) The VK 30.01 (D) and VK 30.02 (D), were two tank designs made by Daimler Benz submitted for the VK 30 project for a 30 tonne tank to be used by the German army. The Vollketten 30.01 (D) and 30.02 (D) in English "fully tracked ,From germ ...

- prototype medium tank; one built *

VK 4501 (P) The VK 45.01 (P), also informally known as Tiger (P) or Porsche Tiger, was a gasoline-electric drive heavy tank prototype designed by Porsche in Germany. Losing to its Henschel competitor on trials, it was not selected for mass production and t ...

- Porsche Tiger tank; 100 hulls built, 90 converted to Ferdinands, one Tiger (P) built, 3 Bergepanzer Tiger (p) and 3 Rammtigers built. * Dicker Max, two prototypes built *

VK 20 The VK 20 series were the proposed replacements of the Panzer IV and Panzer III tanks with entries by MAN, Krupp and Daimler Benz. It was initially projected to weigh 20 tonnes, but grew to 24 tonnes. By November 1941, the designs almost reached c ...

, medium tank proposed to replace the Panzer III and Panzer IV; paper project * Panzer-Selbstfahrlafette II, half-track tank destroyer; two built * Panzer-Selbstfahrlafette IV Ausf. C, SPG, 3 built *

Geschützwagen Tiger The ''Geschützwagen Tiger'' (''G.W. Tiger'') was a German self-propelled gun carrier of World War II that never saw service. It would have been able to carry either the 17cm ''Kanone'' K72 (Sf) or the short barrelled 21cm ''Mörser'' 18/1 wh ...

, self-propelled artillery gun; one partial prototype built *

VK 1602 Leopard The VK 16.02 ''Leopard'' was a planned German light reconnaissance vehicle designed from mid-1941 through to January 1943, with serial production scheduled for April 1943. It was intended to be the replacement of Panzer II Ausf. L "Luchs". The p ...

, reconnaissance tank; paper project

Italy

Semovente da 20/70 quadruplo The Semovente da 20/70 quadruplo was an experimental self-propelled anti-aircraft weapon developed for the Italian Royal Army during World War II. Development During 1942 the Royal Italian Army had ordered the development of a self-propelled a ...

, self-propelled anti-aircraft gun *

Semovente da 149/40 The Semovente da 149/40 was an Italian self-propelled artillery piece designed in 1942. Only a single unit was built; this vehicle is displayed at the US Army Ordnance Museum, Aberdeen, Maryland. History The Italian Army was not far behind t ...

, self-propelled gun *

Fiat M16/43 The ''Carro Armato M Celere Sahariano'' (Italian for "Saharian Fast Medium Tank") or ''Fiat M16/43'' was a prototype medium tank developed by the Kingdom of Italy during World War II to match the speed and firepower of contemporary British cruis ...

, fast medium tank * P43 heavy tank,

Fiat Fiat Automobiles S.p.A. (, , ; originally FIAT, it, Fabbrica Italiana Automobili di Torino, lit=Italian Automobiles Factory of Turin) is an Italian automobile manufacturer, formerly part of Fiat Chrysler Automobiles, and since 2021 a subsidiary ...

Ansaldo's design for a new heavy tank.

Japan

Experimental105mm anti-tank self-propelled gun Ka-To 01

Type 95 heavy tank The Type 95 heavy tank was the final result of Japanese multi-turreted tank design, and was in commission during the time period between World War I and World War II. Modeled on German and Italian tank designs, this tank featured 3 turrets. The ...

; 4 built in 1934 * Ji-Ro (or Ji-Ro Sha)

Type 92 10 cm cannon The was a field gun used by the Imperial Japanese Army during the Second Sino-Japanese War and World War II. The Type 92 number was designated for the year the gun was accepted, 2592 in the Japanese imperial year calendar, or 1932 in the Gregori ...

self-propelled gun Self-propelled artillery (also called locomotive artillery) is artillery equipped with its own propulsion system to move toward its firing position. Within the terminology are the self-propelled gun, self-propelled howitzer, self-propelled mo ...

on Type 95 heavy tank chassis * Hi-Ro Sha (or Hiro-sha) 10 cm cannon self-propelled gun on Type 95 Heavy tank chassis * Type 97 Chi-Ni medium tank; one prototype built *

Type 98 Chi-Ho medium tank The experimental Type 98 ''Chi-Ho'' was a prototype Japanese medium tank. It was developed on orders from the Imperial Japanese Army. "Chi Ho" indicates that it is designated as the 5th Iroha, (I, Ro, Ha, Ni, Ho) medium (Chi) tank. A total of fou ...

; 4 built, two in 1940 and two in 1941 *

O-I super-heavy tank O-I was the name given to a proposed series of Japanese super-heavy tanks, to be used in the Pacific Theater. The vehicle was planned to be very heavy and have a crew of 11. The complete history of the O-I is unknown, due to the “obscure” na ...

design in the 120-ton range. Exact stage of development unknown *

Type 98 Ta-Se The experimental Type 98 Ta-Se was a Japanese self-propelled anti-aircraft gun using a Type 98 20 mm anti-aircraft gun. It used the chassis of the Type 98 Ke-Ni light tank. It did not enter production. Development During development of the ...

single 20 mm self-propelled anti-aircraft gun on a Type 98 Ke-Ni chassis *

Type 98 20 mm AAG Tank The Type 98 20 mm AAG (anti-air gun) tank was a Japanese self-propelled anti-aircraft gun using a twin Soki Type II 20 mm anti-air gun. They were combined with the chassis of the Type 98 Ke-Ni. The gun crew worked from a raised platform ...

twin 20 mm self-propelled anti-aircraft gun on a Type 98 Ke-Ni chassis * ATG Carrier So-To; light armored transport with an AT Gun in

Type 97 Te-Ke The was a tankette used by the Imperial Japanese Army in the Second Sino-Japanese War, at Nomonhan against the Soviet Union, and in World War II. It was designed as a fast reconnaissance vehicle, and was a replacement for the earlier Type 94 ta ...

tankette structure * Type 3 Ke-Ri light tank; a few prototypes were produced * Type 2 Ku-Se 75 mm self-propelled gun on a Type 1 Chi-He chassis *

Type 4 Chi-To medium tank The ("Imperial Year 2604 Medium Tank Model 7") was one of several medium tanks developed by the Imperial Japanese Army towards the end of World War II. While by far the most advanced Japanese wartime tank to reach production, industrial and mate ...

; two completed and four chassis manufactured *

Type 5 Chi-Ri medium tank The ("Imperial Year 2605 Medium Tank Model 9") was a medium tank developed by the Imperial Japanese Army in World War II. It was intended to be a heavier, more powerful version of Japan's prototype Type 4 Chi-To medium tank. Only one incomplete ...

; one incomplete prototype built * Type 5 Ke-Ho light tank; one prototype built * Type 4 Ho-To 12 cm

on a modified Type 95 Ha-Go chassis *

Type 5 Ho-Ru The was a light tank used by the Empire of Japan during the Second Sino-Japanese War, at Battles of Khalkhin Gol, Nomonhan against the Soviet Union, and in the Second World War. It proved sufficient against infantry but, like the American M3 Stu ...

47 mm self-propelled gun; a light tank destroyer akin to the German

Hetzer The ''Jagdpanzer'' 38 ( Sd.Kfz. 138/2), originally the leichter Panzerjäger 38(t), known mostly post-war as ''Hetzer'', was a German light tank destroyer of the Second World War based on a modified Czechoslovakian Panzer 38(t) chassis. Germa ...

; one prototype built *

Type 5 Na-To The , officially known as the was the penultimate tank destroyer developed by the Imperial Japanese Army in 1945, during the closing stages of World War II. History and development Towards the end of the Pacific War, Japanese field commanders r ...

tank destroyer; two built *

Type 5 To-Ku The was a Japanese prototype amphibious tank developed in 1945. The development status by the end of the Pacific War is not clearly known. The To-Ku was large and heavy; it boasted extensive armor protection with 50 mm of armor plate in the ...

amphibious tank * Type 5 Ho-Ri tank destroyer with a 105 mm cannon and an additional 37 mm gun; exact status unknown * Naval 12 cm SPG naval Type 10 120 mm gun on a Type 97 Chi-Ha chassis; one prototype built * Ka-To or Ka-To Sha 105 mm SP AT Gun. Ka-To was a combination of the

open top superstructure and the extended hull of the

Type 4 Chi-To The ("Imperial Year 2604 Medium Tank Model 7") was one of several medium tanks developed by the Imperial Japanese Army towards the end of World War II. While by far the most advanced Japanese wartime tank to reach production, industrial and mate ...

. Exact stage of development unknown * Type 5 15 cm SPG Ho-Chi or Ho-Chi Sha. Similar to

Type 1 Ho-Ni I The was a tank destroyer and self-propelled artillery developed by the Imperial Japanese Army for use during World War II in the Pacific theater. It saw limited combat action, being first deployed at the Battle of Luzon in the Philippines in 194 ...

and

Type 4 Ho-Ro The was based on an already existing reinforced Type 97 Chi-Ha medium tank chassis developed by the Imperial Japanese Army in World War II. Development Inspired by the Grille series of self-propelled artillery vehicles developed by Nazi Germany ...

SPGs, it had a Type 96 15 cm (149.1 mm) howitzer mounted on a Type 97 chassis. Stage of development unknown

New Zealand

Schofield tank The Schofield tank, named after its designer, was a New Zealand tank design of the Second World War. Developed in 1940 when it seemed that the Pacific War might reach New Zealand and with little likelihood of weapons coming from Britain, it did ...

Bob Semple tank The Bob Semple tank (sometimes referred to as Big Bob) was a light tank designed by New Zealand Minister of Works Bob Semple during World War II. Originating out of the need to build military hardware from available materials, the tank was built ...

Poland

9TP 9TP (code for pl, dziewięciotonowy polski - "9-tonne Polish") was a Polish light tank of early World War II era. A development of the earlier 7TP tank, it was to replace its predecessor in Polish service in 1940. Due to the outbreak of the w ...

light tank * 4TP (light) tank * 10TP tank * 14TP medium tank * 20/25TP medium tank * PZInż 130 amphibious tank * PZInż 152 * PZInż 202 * PZInż 222 * PZInż 303 * PZInż 342 * PZInż 603 * TKW (light) reconnaissance tank *

TKS-D The TK (TK-3) and TKS were Polish tankettes developed during the 1930s and used in the Second World War. Design and development The TK (also known as the TK-3) tankette was a Polish design produced from 1931 based on the chassis of the British ...

light tank destroyer

Romania

* Mareșal tank destroyer * TACAM T-38

Spain

Verdeja Verdeja was the name of a series of light tanks developed in Spain between 1938 and 1954 in an attempt to replace German Panzer I and Soviet T-26 tanks in Spanish service. The program was headed by major Félix Verdeja Bardales and led to ...

Soviet Union

Antonov A-40 The Antonov A-40 ''Krylya Tanka'' (russian: крылья танка, meaning "tank wings") was a Soviet attempt to allow a tank to glide onto a battlefield after being towed aloft by an airplane, to support airborne forces or partisans.Winc ...

T-43 medium tank The T-43 medium tank was a prototype Soviet medium tank developed during the Second World War as a possible replacement for both the T-34 medium and KV-1 heavy tanks. The project's aim was to build a medium tank with heavier armour, but German ad ...

SMK tank The SMK was an armored vehicle prototype developed by the Soviet Union prior to the Second World War. It was named after Sergei Mironovich Kirov, a Communist Party official assassinated in 1934. The SMK was discovered and classified by German i ...

heavy tank; one built *

T-100 tank The T-100 was a Soviet twin-turreted heavy tank prototype, designed in 1938–39 as a possible replacement for the T-35 heavy tank. The T-100 was designed by N. Barykov's OKMO design team at S.M. Kirov Factory No. 185 in Leningrad. The T-100 wa ...

heavy tank *

SU-100Y Self-Propelled Gun The SU-100Y was a Soviet prototype self-propelled gun, developed from the prototype T-100 tank. It was developed during the Winter War with Finland to include a 130 mm gun to destroy concrete defensive structures like bunkers and anti-tan ...

130mm gun on the T-100 chassis * SU-14 heavy self-propelled gun on a T-35 chassis *

PPG tankette The PPG tankette ( ru , ППГ; Подвижное пулемётное гнездо, ''PPG; Podvizhnoye pulemyotnoye gnezdo''; literally "mobile machine-gun nest"), also known by the prototype name ''Object 217'', was a Soviet tankette produced ...

Object 416 The Object 416 (Russian: Объект 416) is a Soviet prototype self-propelled artillery. It never went beyond prototype stage. It was intended to be a low profile tank destroyer. History Object 416 was an odd experimental Soviet medium tank co ...

* IS-6 Heavy tank *

IS-7 The IS-7 heavy tank, also known by its project name Object 260, is a Soviet tank that began development in 1945. The vehicle existed only in prototype form and was cancelled in favor of the T-10 tank. Design and production The IS-7 heavy tank ...

heavy tank; six prototypes built, cancelled in favor of the T-10 * KV-3 * KV-4 super-heavy tank; paper project * KV-5 * KV-9 * KV-10 * KV-11 * KV-12 *

KV-13 The KV-13 (Russian: KB-13) was an experimental Soviet medium tank created during World War II.Solyankin, p. 79.Svirin, p. 97. It was developed on the KV-1 chassis in the SKB-2 design bureau of the Chelyabinsk Kirov Plant in late 1941 – earl ...

Three prototypes built.

United Kingdom

* Tank, Heavy, TOG I * Tank Heavy, TOG II * Tank, Heavy Assault, Excelsior (A33) * Tank, Infantry, Valiant (A38) * Tank, Heavy Assault, Tortoise (A39) * Tank, Infantry, Black Prince (A43) *

A20 heavy tank A20 was a British tank design by Harland and Wolff to meet an Army requirement for an infantry tank that could replace the Matilda II and Valentine tank. It was designed in the expectation that conditions would be similar to those of the Wor ...

Alecto Alecto ( grc, Ἀληκτώ, Alēktṓ, the implacable or unceasing anger) is one of the Erinyes (Furies) in Greek mythology. Family and description According to Hesiod, Alecto was the daughter of Gaea fertilized by the blood spilled from Uranu ...

United States

M6 heavy tank The Heavy Tank M6 was an American heavy tank designed during World War II. The tank was produced in small numbers and never saw combat. Development Because of limited budgets for tank development in the interwar years, at the outbreak of Worl ...

* M7 Medium Tank *

M38 Wolfhound The M38 Wolfhound was a 6×6 US armored car produced in 1944 by the Chevrolet division of General Motors. It was designed as a replacement for the M8 Greyhound series, but the end of the war in 1945 led to the cancellation of the project afte ...

T14 Heavy Tank The Assault Tank T14 was a joint project between the United States and the United Kingdom with the goal being to produce a universal infantry tank. The T14 project never came to fruition, as a pilot model was not delivered to the UK until 1944 by ...

T18 Howitzer Motor Carriage The T18 Howitzer Motor Carriage, abbreviated as HMC. was an American self-propelled gun. Its development started in September 1941 as a close-support vehicle using the M3 Stuart's chassis. A 75 mm howitzer was mounted on the right front of ...

; 75 mm howitzer on a M3 chassis * T20 Medium Tank * T27 Armored Car *

T28 Super Heavy Tank The T28 Super Heavy Tank was an American heavily armored tank/self-propelled gun designed for the United States Army during World War II. It was originally designed to break through German defenses of the Siegfried Line, and was later considered ...

T29 Heavy Tank The Heavy Tank T29 was an American heavy tank project started in March 1944 to counter the appearance of the German Tiger II heavy tank. The T29 was not ready in time for the war in Europe, but it did provide post-war engineers with opportuniti ...

T30 Heavy Tank The Heavy Tank T30 was a World War II American tank project developed to counter new German tanks, such as Tiger I, Tiger II, and tank destroyers, such as the ''Jagdtiger'', or Soviet heavy tanks, such as IS-1 or IS-2. The T30 was designed at th ...

* T32 Heavy Tank *

T34 Heavy Tank The T34 Heavy Tank was an American design for a heavy tank. It evolved from the T29 Heavy Tank and T30 Heavy Tank in 1945, using the same chassis, but sporting a modified 120 mm Gun M1 anti-aircraft gun. Extra armor plating was applied to the r ...

* T40/M9 Tank Destroyer * T54 Gun Motor Carriage *

T55E1 Gun Motor Carriage The T55E1 3-inch Gun Motor Carriage was a prototype vehicle developed by the Allied Machinery Manufacturing Company in 1943 for the US Army. An eight-wheel drive vehicle, the T55E1 was armed with one three-inch gun in a limited traverse mounting a ...

T82 Howitzer Motor Carriage T8 or T-8 may refer to the following: Measurement * T8, a Torx screwhead size * T8, a 1 inch fluorescent lamp size * A tornado intensity rating on the TORRO scale Biology * The 8th thoracic vertebra * The T8 spinal nerve Transportation * Trikke8 ...

* T84 Howitzer Motor Carriage * T88 Gun Motor Carriage; 105 mm howitzer on a M18 chassis *

T92 Howitzer Motor Carriage The 240 mm Howitzer Motor Carriage T92 was a self-propelled howitzer developed by the United States during World War II. The same mounting with the 8-inch Gun M1 was developed as the T93. Neither was built in significant numbers and the war ...