Basic Specifications
| Specification | Details |
|---|---|
| Engine Series | 1HD |
| Type | V8 SOHC or DOHC (varies by version) |
| Displacement | 4.2 L (4164 cc) |
| Bore × Stroke | 94 × 100 mm |
| Compression Ratio | 21.0:1 (1HD-T) / 21.0–22.0:1 (1HD-FT) |
| Fuel System | Direct injection, mechanical or electronic (Turbo varies) |
| Aspiration | Naturally aspirated or Turbocharged |
| Power Output | 130–202 hp (depending on version) |
| Torque | 343–430 Nm |
| Common Features | Cast-iron block, aluminum head, timing gear or chain, mechanical/electronic fuel injection |
Common Versions
-
1HD-T (1989–1995)
- Turbocharged, mechanical fuel injection
- ~130 hp, 343 Nm
- Used in Land Cruiser 80 series
-
1HD-FT (1995–2007)
- Turbocharged, electronic fuel injection (EFI)
- ~166–202 hp, 430 Nm
- Improved efficiency and emissions
- Used in Land Cruiser 80 and 100 series
Key Applications
| Vehicle | Years |
|---|---|
| Toyota Land Cruiser 80 | 1989–1997 |
| Toyota Land Cruiser 100 | 1998–2007 |
| Toyota Coaster Diesel | Various years |
| Some regional Hilux / heavy-duty pickups | Select markets |
Strengths
- Extremely durable for high-mileage applications
- Excellent off-road performance
- Simple mechanical design in early versions (1HD-T)
- High torque at low RPM, ideal for towing
Known Issues
- Head gasket failures (older engines)
- Injector pump wear
- Turbocharger wear in high-mileage engines
- Valve adjustments needed periodically (mechanical versions)