Basic Specifications
| Specification | Details |
|---|---|
| Engine Model | 1HZ |
| Type | Inline-6 diesel, SOHC 12-valve |
| Displacement | 4164 cc (4.2L) |
| Bore × Stroke | 94 × 100 mm |
| Compression Ratio | 22.0:1 |
| Aspiration | Naturally aspirated |
| Fuel System | Indirect injection (mechanical pump) |
| Power Output | ~130 hp |
| Torque | ~343 Nm |
| Materials | Cast iron block, aluminum head |
| Timing | Timing gears, simple mechanical design |
Key Applications
| Vehicle | Years |
|---|---|
| Toyota Land Cruiser 70 series | 1989–present (varies by region) |
| Toyota Land Cruiser 80 series | Select markets |
| Toyota Land Cruiser 105 | Select regions |
| Toyota Coaster diesel | Various markets |
Strengths
- Extremely robust and reliable, ideal for off-road and heavy-duty use
- Low-maintenance mechanical design
- Long engine life, often exceeding 500,000 km with proper maintenance
- Excellent low-RPM torque
Known Considerations
- Naturally aspirated: lower power compared to turbocharged diesels
- Indirect injection: slightly less fuel-efficient than direct injection engines
- Timing gear maintenance recommended at high mileage
- Injector pump and glow plugs require periodic checks