Toyota AR engine

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Toyota AR engine
Manufacturer Toyota Motor Corporation
Production 2008-
Combustion chamber
Configuration Straight-4 4-cylinder
Predecessor Toyota AZ engine
Toyota S engine

The AR engine family is a straight-4 piston engine series by Toyota, first introduced in 2008 for the RAV4, and subsequently for the Highlander, Venza, Camry and Scion tC.

The AR series uses a die-cast aluminium engine block and aluminium DOHC cylinder head. The engine series shares many of the technologies in the AZ engine, while incorporating new features such as variable valve timing on both intake and exhaust camshafts or dual VVT-i, low friction technologies including an offset crankshaft, roller rockers for the valvetrain, a three-stage variable oil pump, reduced-tension piston rings and auxiliary belt drive. An Acoustic Control Induction System switches the length of the intake tract in two stages, based on rpm and throttle angle, thereby ensuring strong torque across a broad engine speed range. New tumble control valves enhances combustion while the engine is cold, and helps to bring the catalytic converters up to working temperature quickly. The Tumble control valves, along with new 12-hole high atomizing long-nozzle fuel injectors, reduce the amount of fuel adhering to the intake ports and therefore maximize fuel economy and reduce harmful emissions.

The cylinder block is an open-deck, midi-skirt 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.

The AR engine replaces the AZ engine.


Manufacturer Toyota
Combustion chamber
Displacement 2,672 cc (163.1 cu in)
Cylinder bore 90 mm (3.543 in)
Piston stroke 105 mm (4.134 in)
Cylinder block alloy alloy
Cylinder head alloy alloy
Valvetrain DOHC
Compression ratio 10.0
Fuel system EFI
Fuel type petrol (gasoline)
Power output 182–187 bhp (136–139 kW)
Torque output 182–186 lb·ft (247–252 N·m)

A 2.7 L version of the AR family, first released in the Venza[1] and Highlander in late 2008.[2]


  • Toyota Venza AGV10/15, 185 PS (136 kW; 182 hp)@5800, 247 N·m (182 lbf·ft)@4200
  • Toyota Highlander ASU40, 190 PS (140 kW; 187 hp)@5800, 252 N·m (186 lbf·ft)@4100
  • Toyota Sienna ASU40, 190 PS (140 kW; 187 hp)@5800, 252 N·m (186 lbf·ft)@4100
  • Lexus RX AGL10, 138 kW (188 PS)@5800, 252 N·m (186 lbf·ft)@4200


Manufacturer Toyota
Combustion chamber
Displacement 2,494 cc (152.2 cu in)
Cylinder bore 90 mm (3.543 in)
Piston stroke 98 mm (3.858 in)
Cylinder block alloy alloy
Cylinder head alloy alloy
Valvetrain DOHC
Compression ratio 10.4
Fuel system EFI
Fuel type petrol (gasoline)
Power output 169–180 bhp (126–134 kW)
Torque output 167–173 lb·ft (226–235 N·m)

A 2.5 L version of the AR family, first released in the RAV4 in the U.S. and Canada in 2008.[3] This engine also replaced the 2AZ-FE in the U.S. and Canada Camry in early 2009, giving 11% better fuel economy.[4] The engine service mass is 324 lb (147 kg) that includes the oil and coolant fully filled. The engine is used in the U.S., Australia,[5] New Zealand,[6] China, Taiwan, Korea, Malaysia, Philippines, Thailand[7] and Indonesia.


  • Toyota RAV4 (ASA33/38), 181 PS (133 kW; 179 hp)@6000, 233 N·m (172 lbf·ft)@4000
  • Toyota Camry ASV40 (Base & LE), 171 PS (126 kW; 169 hp)@6000, 226 N·m (167 lbf·ft)@4100
  • Toyota Camry ASV40 (SE and worldwide) 181 PS (133 kW; 179 hp)@6000, 233 N·m (172 lbf·ft)@4100
  • Toyota Camry ASV50, 180 PS (132 kW; 178 hp)@6000, 233 N·m (172 lbf·ft)@4100
  • Scion tC (AGT20), 180 hp (130 kW), 173 lb·ft (235 N·m)
  • Toyota Alphard (AH30)


The 2AR-FXE [8] is an Atkinson cycle variant of the 2AR-FE. It has the same bore and stroke, but the cams and pistons are unique. Geometrical compression ratio is 12.5:1

The large valve overlap leads to a reduction in cylinder charge and reduced torque and power output, but efficiency is increased. This combination makes the 2AR-FXE suitable for use in hybrid vehicles, where peak torque and power demands can be met by the electric motor and battery.

Maximum output when used in the Camry hybrid is 154 hp with 153 lb·ft of torque which doesn't include the additional power of the electric motor that is used in the Camry Hybrid.



The 2AR-FSE [9] is a variant of the 2AR-FE equipped with D4-S direct-injection and port injection. It has the same bore and stroke as other 2AR engines but the cylinder head, cams, pistons and fuel management system are unique. Thermal efficiency is about 38.5%.[10] The expansion ratio is 13.0 to 1.

Output in the Toyota Crown hybrid is 178 hp (133 kW) at 6000 rpm and 221 N·m (163 lbf·ft) at 4200–4800 rpm.



The 6AR-FSE is a 4-cylinder, 1998 cc, twincam, petrol engine equipped with D4-S direct fuel injection and VVT-iW. It can work in the Otto cycle and a modified-Atkinson cycle depending on output power. It was first introduced in the Camry in December 2014 for the Chinese market and March 2015 for the Thai market. The output of 6AR-FSE is 123 kW (165 bhp) at 6500 RPM and 199 N·m (147 lbf·ft) at 4600 RPM.[11] The stroke and bore are 86 mm × 86 mm.



A 2.0 L turbocharged direct-injected member the AR family, fitted with VVT-iW it is able to operate in both the Otto and a modified-Atkinson cycle. First debuted in the Lexus NX200t.[13] Power output in the 2015 NX200t is 175 kW (235 hp) at 4,800 - 5,600 rpm and 350 N·m (258 lb·ft) at 1,650 - 4000 rpm. The 8AR-FTS engine had Lexus’ ESTEC D-4ST (Economy with Superior Thermal Efficient Combustion Direct injection 4-stroke with Turbo) fuel injection. With separate twin injectors for both direct and port injection, ESTEC D-4ST could perform high-pressure direct injection into the cylinder and conventional intake port injection, or direct cylinder injection only, according to engine speed.[14] Power output in some applications, e.g. Lexus IS 200t XE30, Lexus GS 200t and Lexus RC 200t is bumped up by 5 kW in the same rev range but torque remains the same.[14]



In Japan built by Toyota Motor Corporation in Kamigo Plant and by Toyota Industries Corporation[19][20] Toyota Motor Manufacturing Alabama, Inc. (TMMAL) will start building the AR 2.5L and 2.7L engines beginning in mid-2011.[21]

GAC Toyota Engine Co.,Ltd Guangqi, China, announced start of AR 2.5L and 2.7L engine production November 2011[22]

Toyota Australia officially opened its new engine plant producing both petrol and hybrid engine variants in Melbourne. [23]

See also[edit]


  1. ^ "2009 Venza Product Information" (Press release). USA: Toyota. 2008-11-03. Retrieved 2013-05-24. 
  2. ^ "2009 Highlander Product Information" (Press release). USA: Toyota. 2008-09-11. Retrieved 2013-05-24. 
  3. ^ "2009 RAV4 Product Information" (Press release). USA: Toyota. 2008-09-11. Retrieved 2013-05-24. 
  4. ^ Madelin, Jacqui (2012-02-26). "Camry: Toyota eyes fleet buyers". NZ Herald News. Retrieved 2013-05-24. 
  5. ^ "Toyota Camry homepage". Australia: Toyota. Retrieved 2013-05-24. 
  6. ^ "Camry - Are you an Executive of Life?". New Zealand: Toyota. Retrieved 2013-05-24. 
  7. ^ "ข้อมูลทางเทคนิค - New Camry" [Technical - New Camry] (in Thai). Thailand: Toyota. Retrieved 2013-05-24. 
  8. ^
  9. ^ Lithgow, Ian. "2AR-FSE Lexus engine". Retrieved 2015-08-28. 
  10. ^ "Lexus begins sales of new IS 300h hybrid in Japan along with new IS lineup". Green Car Congress. 2013-05-16. Retrieved 2015-05-03. 
  11. ^ "New Camry" (PDF) (Brochure). Malaysia: Toyota. October 2015. Retrieved 2016-01-12. 
  12. ^ Lee, Jonathan (2015-04-20). "Shanghai 2015: Lexus ES facelift unveiled, new 2.0 mill". Retrieved 2015-04-21. 
  13. ^ "LEXUS、コンパクトクロスオーバーSUV「NX」をワールドプレミア" [Lexus, world premiere of the compact crossover SUV "NX"] (Press release). Japan: Toyota. 2014-04-20. Retrieved 2014-06-22. 
  14. ^ a b "8AR-FTS Toyota engine". Retrieved 2016-07-02. 
  15. ^ Goreham, John (2014-08-01). "Upcoming Lexus IS 200t will be more than 1 second faster to 60 MPH". Torque News. United Kingdom. Retrieved 2015-04-16. 
  16. ^ "Mingling with the Classics: Lexus Introduces 2016 GS During Pebble Beach Concours Celebrations" (Press release). US: Toyota. 2015-08-13. Retrieved 2015-08-22. 
  17. ^ Tan, Paul (2015-04-20). "Shanghai 2015: Lexus RX 200t replaces the old RX 270". Malaysia. Retrieved 2015-04-20. 
  18. ^ Radu, Mihnea (2015-10-02). "Toyota Crown Gets 2-Liter Turbo Engine, Upgraded Suspension in Japan". Retrieved 2015-10-24. 
  19. ^ "General Status of Plants in Japan | Kamigo Plant" (Press release). Toyota. 2012. Retrieved 2013-05-25. 
  20. ^ "Engines for Passenger Cars". Japan: Toyota Industries. Retrieved 2013-05-25. 
  21. ^ "TMC's Alabama, U.S.A. Plant to Build 4-cylinder Engines" (Press release). Japan: Toyota. 2009-08-21. Retrieved 2013-05-25. 
  22. ^ 中国の広汽トヨタエンジン工場で新型エンジンの生産開始 [Start of production of the new Toyota engine, in Guangqi Toyota engine plant in China] (Press release) (in Japanese). Japan: Toyota. 2011-11-09. Retrieved 2013-05-25. 
  23. ^ "Toyota Unveils New Engine Plant". Australia: Toyota Australia. Retrieved 2013-08-16.