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Toyota RZ engine

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Toyota RZ engine
Overview
ManufacturerToyota Motor Corporation
Production1989–2004
Layout
ConfigurationNaturally aspirated Straight-4
Cylinder bore
  • 86 mm (3.39 in)
  • 95 mm (3.74 in)
Piston stroke
  • 86 mm (3.39 in)
  • 95 mm (3.74 in)
Cylinder block materialCast iron
Cylinder head materialAluminum
RPM range
Max. engine speed5,500
Combustion
Fuel systemElectronic fuel injection
Fuel typeGasoline
Cooling systemWater-cooled
Output
Power output101–150 hp (75–112 kW; 102–152 PS)
Torque output118–177 lb⋅ft (160–240 N⋅m)
Chronology
Predecessor
SuccessorToyota TR engine

The Toyota RZ engine family is a straight-four piston engine series built in Japan. The RZ series uses a cast-iron engine block and aluminum SOHC or DOHC cylinder heads. It has electronic fuel injection (EFI), 2 or 4 valves per cylinder and features forged steel connecting rods.

1RZ

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The 1RZ is a 2.0 L (1,998 cc) version built from 1989. Bore and stroke is 86 mm × 86 mm (3.39 in × 3.39 in). The original carburetted model in Japanese trim produces 100 PS (74 kW; 99 hp) at 5,400 rpm and maximum torque of 162 N⋅m (119 lb⋅ft) at 2,400 prm.

Applications:

1RZ-E

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The 1RZ-E is the fuel-injected version of the 1RZ. With a compression ratio of 9.0:1 and in Japanese trim, output is 110 PS (81 kW; 108 hp) at 5,200 rpm and maximum torque of 167 N⋅m (123 lb⋅ft) at 2,600 prm. With redline at 5,500 rpm.

Applications:

2RZ

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The 2RZ is a 2.4 L (2,438 cc) version. Bore and stroke is 95 mm × 86 mm (3.74 in × 3.39 in); a variety of combination of heads and fuel delivery systems were available.

2RZ-E

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2RZ-E Engine in a 1994 Toyota HiAce (RZH101G)

This is an SOHC engine with two valves per cylinder. Valve adjustment is by shim over bucket. Output is 120 PS (88 kW; 118 hp) at 4800 rpm with 146 lb⋅ft (198N⋅m) of torque at 2600 rpm. Originally manufactured with a carburetor induction system, it was later upgraded to Electronic Fuel Injection, with the -E suffix added to the engine designation. Toyota specified unleaded fuel with a rating of at least 91 RON in Australia.

Applications:

2RZ-FE

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The 2RZ-FE, and 4RB1 or 4RB2 in China, is a 2.4 L (2,438 cc) version. Bore and stroke is 95 mm × 86 mm (3.74 in × 3.39 in). Compression ratio is 9.5:1. Output is 142 hp (106 kW; 144 PS) at 5000 rpm with 160 lb⋅ft (217 N⋅m) of torque at 4000 rpm. This engine does not feature balance shafts. It has four valves per cylinder and DOHC. Valve adjustment is by shim over bucket. The 2RZ-FE is an interference engine with a timing chain. A 2.2 L (2,185 cc) version called the 4RB3 is also manufactured in China. This one has a bore and stroke of 91 mm × 84 mm (3.58 in × 3.31 in), while sharing the 2RZ's 102.5 mm (4.04 in) bore spacing.


Applications:

3RZ

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3RZ-FE

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The 3RZ-FE is a 2.7 L (2,693 cc) version. Bore and stroke is 95 mm × 95 mm (3.74 in × 3.74 in). Compression ratio is 9.5:1. Output is 150 hp (112 kW; 152 PS) at 4800 rpm with 177 lb⋅ft (240 N⋅m) of torque at 4000 rpm. This engine features twin, chain-driven balance shafts. It has four valves per cylinder and DOHC. Valve adjustment is by shim over bucket. The 3RZ-FE is an interference engine with a timing chain.

3RZ-FE in a Toyota Tacoma

Applications:

See also

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References

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