Toyota GZ engine
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| Toyota GZ engine | |
|---|---|
 Toyota's 1GZ-FE engine installed in the GZG50 Century | |
| Overview | |
| Manufacturer | Toyota |
| Production | 1997–2017 |
| Layout | |
| Configuration | 60° V12[1] |
| Displacement | 4,996 cc (304.9 cu in) |
| Cylinder bore | 81 mm (3.189 in) |
| Piston stroke | 80.8 mm (3.181 in) |
| Valvetrain | DOHC |
| Compression ratio | 10.5:1 |
| Combustion | |
| Fuel system | Electronic port fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water-cooled |
| Output | |
| Power output |
|
| Specific power |
|
| Torque output | 481 N⋅m (355 lb⋅ft) |
| Chronology | |
| Predecessor | Toyota V engine (V8) |
| Successor | Toyota 2UR-FSE engine (V8) |
The Toyota GZ engine family consists of a single model, the 1GZ-FE. This engine is used as the powerplant for the second generation Century limousine from 1997 to 2017.
Applications
The 1GZ-FE is a 4,996 cc (5.0 L) 48-valve DOHC V12 engine with variable valve timing (VVT-i). Bore is 81 mm and stroke is 80.8 mm, with a compression ratio of 10.5:1. The official power output advertised in Japan per the gentlemen's agreement is 206 kW (276 hp; 280 PS) at 5,200 rpm, though it was advertised as 220 kW (295 hp; 299 PS) in export markets. Peak torque of 481 N⋅m (355 lbf⋅ft) is at 4,000 rpm with over 400 N⋅m (295 lbf⋅ft) available from as little as 1200 rpm. The Electronic fuel-injection system is controlled by two ECUs, one for each bank of six cylinders. The engine is capable of running on either bank should a malfunction occur.[2]
In 2010 the standard engine was revised in order to meet tough fuel economy and emissions standards, reducing power slightly and peak torque to 460 N⋅m (339 lbf⋅ft) although this torque figure had been advertised in export markets since at least 2004.[3]
- 1997–2017 Toyota Century (GZG50)
- 2006–2008 Toyota Century Royal (GZG51)
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