Toyota FZ engine

The Toyota FZ engine was a 24-valve, 4.5 L (4,477 cc) DOHC straight-6 internal combustion engine manufactured by Toyota to replace the F-series engine. It was used primarily in SUVs because of its large displacement, smoothness, ruggedness and torque.

FZ engine
Toyota 1FZ FE.jpg
Displacement4.5 L (4,477 cc)
Cylinder bore100 mm (3.94 in)
Piston stroke95 mm (3.74 in)
ValvetrainDOHC 4 valves x cyl.
Compression ratio9.0:1
Fuel system
Fuel typePetrol
Cooling systemWater-cooled
Power output
  • 190 hp (142 kW) (1FZ-F)
  • 212 hp (158 kW) (1FZ-FE)
240 hp (179 kW) (1FZ-FE 1998-2009)
Torque output
  • 268 lb⋅ft (363 N⋅m) @ 2800 RPM (1FZ-F)
  • 275 lb⋅ft (373 N⋅m) @ 3200 RPM (1FZ-FE)
300 lb⋅ft (407 N⋅m) @ 3600 RPM (1FZ-FE 1998-2009)
PredecessorToyota F engine

Technical dataEdit

The engine displaced 4.5 L (4,477 cc) with a bore and stroke measuring 100 mm × 95 mm (3.94 in × 3.74 in), respectively and a 9.0:1 compression ratio; the head used Toyota's narrow-angle overhead camshafts for better fuel economy.[1] The 1FZ had only two variants available: the 1FZ-F and the 1FZ-FE. The only significant difference between the two was the inclusion of electronic fuel injection on the 1FZ-FE, whereas the 1FZ-F used a carburetor.[2]

The 1FZ-F produced 188 hp (140 kW) at 4400 rpm and 268 lb⋅ft (363 N⋅m) at 2800 rpm; its fuel injected counterpart produced 212 hp (158 kW) at 4600 rpm and 275 lb⋅ft (373 N⋅m) at 3200 rpm.

Starting in 1998, the fuel injected version of the 1FZ-FE was also manufactured with a direct ignition variation available in certain non-US markets (the engine pictured here is that variant discernible by the intake manifold and lack of distributor). This version of the engine received many updates over the previous version such as a redesigned head, more compact pistons, updated throttle body, an improved intake manifold with longer intake runners, 4 nozzle fuel injectors to improve fuel atomization and direct ignition. This version of the 1FZ-FE produced 240 hp (179 kW) at 4600 rpm and 300 lb⋅ft (407 N⋅m) at 3600 rpm on 91 Octane Fuel (RON) without a catalytic converter.[citation needed]

Also, a de-rated LPG version was built for the 7FG/7FZ series forklifts. Called 1FZ-E it produced 63 kW (84 hp) at 2350 rpm and 294 N⋅m (217 lbf⋅ft) at 1200 rpm [3]


The 1FZ-F and -FE were used in the following vehicles:

See alsoEdit

List of Toyota engines