The 1HD, 1HZ, and 1KZ are diesel engine series produced by Toyota

The 1HD, 1HZ, and 1KZ are diesel engine series produced by Toyota, each with different characteristics and applications. Here is a brief introduction to these three engines:

1HD Series

Inline 6-cylinder diesel engine, approximately 4.2 liters, usually turbocharged. Available in 12-valve and 24-valve versions, known for its strong torque and reliability, suitable for off-road and heavy-duty applications. Commonly found in off-road vehicles such as the Toyota Land Cruiser.

1HZ Series

Inline 6-cylinder naturally aspirated diesel engine, approximately 4.2 liters. Highly durable, commonly used in Toyota commercial vehicles and off-road vehicles, providing stable power output, but not as powerful as the turbocharged 1HD version. Commonly found in off-road vehicles such as the Toyota Land Cruiser.

1KZ Series

Inline 4-cylinder diesel engine, approximately 3.0 liters, usually turbocharged, popular for its higher power and torque output. Suitable for smaller commercial vehicles and SUVs, such as the Toyota Hilux and RAV4.

In summary, these three engines each have their own characteristics and are suitable for different vehicles and usage needs. The 1HD and 1HZ are mainly used in large off-road vehicles, performing exceptionally well, especially under harsh conditions, while the 1KZ is more suitable for light commercial vehicles and SUVs. When choosing, users can determine the most suitable engine based on their specific needs and usage scenarios.