Toyota AR engine
| Manufacturer | Toyota Motor Corporation |
|---|---|
| Production | 2008- |
| Predecessor | Toyota 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[edit | edit source]
| Manufacturer | Toyota |
|---|---|
| Type | straight-4 cylinder |
| Bore | 3.54 in (89.9 mm) |
| Stroke | 3.854 in (97.9 mm) |
| Displacement | 2.5 L (2494 cc, 152.2 cu in) |
| Block alloy | alloy |
| Head alloy | alloy |
| Valvetrain | DOHC |
| Fuel system | EFI |
| Fuel type | petrol (gasoline) |
| Power output | 179 bhp (133.5 kW) @ 6,000 rpm |
| Torque output | 172 lb·ft (233 N·m) @ 4,000 rpm |
| Compression ratio | 10.4 |
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[edit | edit source]
| Manufacturer | Toyota |
|---|---|
| Type | straight-4 cylinder |
| Bore | 3.54 in (89.9 mm) |
| Stroke | 4.13 in (104.9 mm) |
| Displacement | 2.7 L (2672 cc, 163.1 cu in) |
| Block alloy | alloy |
| Head alloy | alloy |
| Valvetrain | DOHC |
| Fuel system | SFI |
| Fuel type | petrol (gasoline) |
| Power output | 182 bhp (135.7 kW) @ 5,800 rpm |
| Torque output | 182 lb·ft (247 N·m) @ 4,200 rpm |
| Compression ratio | 10.0 |
A 2.7 L version of the AR family, first released in the Venza[2] and Highlander in late 2008.[3]
Applications:
- Venza (2008) [2]
- Highlander (2008) [3]