Toyota UR engine

Toyota UR engine
1UR-FSE engine in a Lexus GS460
Overview
ManufacturerToyota Motor Corporation
Production2006–present
Layout
Configuration90° V8
Displacement4.6 L (4,608 cc)
5.0 L (4,969 cc)
5.7 L (5,663 cc)
Cylinder bore94 mm (3.7 in)
Piston stroke83 mm (3.27 in)
89.5 mm (3.52 in)
102 mm (4.02 in)
Cylinder block materialDie-cast aluminum
Cylinder head materialAluminum
ValvetrainDOHC 4 valves x cyl. w/VVT-i
Compression ratio10.2:1, 11.8:1, 12.3:1
RPM range
Max. engine speed7300 (2UR-FE), 6000 (3UR-FE)
Combustion
SuperchargerEaton Twin Vortices roots-type TRD kit (on some versions)
Fuel systemD-4S direct injection
Fuel typeGasoline
E85 Ethanol (only on 3UR-FBE)
Cooling systemWater cooled
Output
Power output304–472 hp (227–352 kW; 308–479 PS)
Torque output44.8–55.4 kg⋅m (439–543 N⋅m; 324–401 lb⋅ft)
Dimensions
Dry weight222 kg (489 lb)
Chronology
PredecessorToyota UZ engine
SuccessorToyota V35A engine (V6, for 1UR & 3UR series)

The Toyota UR engine family is a 32-valve dual overhead camshaft V8 piston engine series which was first introduced in 2006, as the UZ series it replaced began phasing out. Production started with the 1UR-FSE engine with D-4S direct injection for the 2007 Lexus LS. The series launched with a die-cast aluminum engine block, aluminum cylinder heads and magnesium cylinder head covers.[1] All UR engines feature variable valve timing for both intake and exhaust cams or Dual VVT-i. Timing chains are used to drive the camshafts. The UR engine has been produced in 4.6, 5.0, and 5.7-liter displacement versions.

  1. ^ Vasilash, Gary (2006). "Lexus Comes Into Its Own". Automotive Design & Production. Archived from the original on 2007-09-26. Retrieved 2007-05-06.