Type 4

Type 4 or Type Four may refer to:

• Type Four platform – a front-wheel-drive car platform
• Volkswagen Type 4 – a four-door saloon
• Type 4 encryption – an encryption algorithm
• Type-IV collagen - a class of collagen
• Type-4 Hypersensitivity - a class of hypersensitivity reactions that involves T-cells
• British Railways Type 4 Diesel locomotives

As military equipment, it may refer to:

• Type 4 Chi-To – a Japanese tank
• Type 4 Ke-Nu – a Japanese tank
• Type 4 Ka-Tsu – a Japanese amphibious tank
• Type 4 Ho-Ro – a Japanese self-propelled gun
• Type 4 Ha-To – a Japanese self-propelled gun
• Type 4 75 mm AA Gun - a Japanese anti-aircraft gun
• Type 4 20 cm Rocket Launcher – a Japanese mortar rocket
• Type 4 15 cm howitzer – a Japanese howitzer
• Type 4 rifle - a Japanese experimental rifle