Toyota RZ 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
The 1RZ is a 1998 cc version built from 1989. Bore and stroke is 86x86 mm. The original carburetted model in Japanese trim produces 100 PS at 5,400 rpm and maximum torque of 16.5 kgm at 2,400 prm.

Applications:
 * 1989–1993 Toyota HiAce

1RZ-E
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 at 5,200 rpm and maximum torque of 17 kgm at 2,600 prm. With redline at 5,500 rpm.

Applications:
 * 1989–2004 Toyota HiAce Van, Wagon
 * 1998–2001 Toyota Hilux
 * 2000–2004 Toyota Kijang/Revo/Venture

2RZ
The 2RZ is a 2438 cc version. Bore and stroke is 95x86 mm; a variety of combination of heads and fuel delivery systems were available.

2RZ-E
This is an SOHC engine with two valves per cylinder. Valve adjustment is by shim over bucket. Output is 120 PS 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:
 * 1989–2004 Toyota HiAce (encompassing the RZH1xx series)

2RZ-FE
The 2RZ-FE, and 4RB1 or 4RB2 in China, is a 2438 cc version. Bore and stroke is 95x86 mm. Compression ratio is 9.5:1. Output is 142 hp at 5000 rpm with 160 lbft 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 2185 cc version called the 4RB3 is also manufactured in China. This one has a bore and stroke of 91 x, while sharing the 2RZ's 102.5 mm bore spacing.

Applications:
 * 1995–2004 Toyota Tacoma 4x2
 * 1998–2004 Toyota Hilux
 * 1999-2006 ARO 24 Series

3RZ-FE
The 3RZ-FE is a 2693 cc version. Bore and stroke is 95x95 mm. Compression ratio is 9.5:1. Output is 150 hp at 4800 rpm with 177 lbft 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.



Applications:
 * 1995–2004 Toyota Tacoma
 * 1996–2000 Toyota 4Runner
 * 1994–1998 Toyota T100
 * 1995–2002 Granvia
 * 1995–2004 Toyota Hilux
 * 1990–2004 Toyota HiAce
 * 2001–2009 Toyota Land Cruiser Prado (Venezuela)
 * 1996–2004 Toyota Land Cruiser Prado
 * 1998–2002 Toyota Touring Hiace