Toyota AR engine

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Toyota AR engine
ManufacturerToyota Motor Corporation
Production2008-
PredecessorToyota AZ engine
Toyota S engine


The AR engine family is a straight-4 piston engine series by Toyota, first introduced in late 2008 for the RAV4, Highlander, and Venza. The AR series uses a die-cast aluminium engine block with cast iron cylinder liners and aluminium DOHC cylinder heads. The engine series shares many of the advanced technologies in the AZ engine, with new features such as continuously variable valve timing on both intake and exhaust camshafts (Dual VVT-i).

The cylinder block is an open-deck, midi-skirt aluminium type with cast-in iron liners and a die-cast aluminium lower crankcase and a stamped oil pan. The forged steel crankshaft is fully balanced with eight counterweights and supported by five main bearings. A helical gear pressed in No. 3 counterweight drives twin contra-rotating balance shafts in the shaft housing within the lower crankcase.

2AR

2AR
ManufacturerToyota
Typestraight-4 cylinder
Bore3.54 in (89.9 mm)
Stroke3.854 in (97.9 mm)
Displacement2.5 L (2494 cc, 152.2 cu in)
Block alloyalloy
Head alloyalloy
ValvetrainDOHC
Fuel systemEFI
Fuel typepetrol (gasoline)
Power output179 bhp (133.5 kW) @ 6,000 rpm
Torque output172 lb·ft (233 N·m) @ 4,000 rpm
Compression ratio10.4

A 2.5 L version of the AR family, first released in the RAV4 in late 2008.[1] This engine also replaces the 2AZ-FE in the Camry in early 2009.

Applications:

1AR

1AR
ManufacturerToyota
Typestraight-4 cylinder
Bore3.54 in (89.9 mm)
Stroke4.13 in (104.9 mm)
Displacement2.7 L (2672 cc, 163.1 cu in)
Block alloyalloy
Head alloyalloy
ValvetrainDOHC
Fuel systemSFI
Fuel typepetrol (gasoline)
Power output182 bhp (135.7 kW) @ 5,800 rpm
Torque output182 lb·ft (247 N·m) @ 4,200 rpm
Compression ratio10.0

A 2.7 L version of the AR family, first released in the Venza[2] and Highlander in late 2008.[3]

Applications:

References