The Toyota UR engine family is a 32-valve quad-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 D4-S direct injection for the 2007 Lexus LS.
Cylinder bore: 94 mm (3.7 in)
Piston stroke: 83 mm (3.27 in); 89.5 mm (3.52 in); 102 mm (4.02 in)
Dry weight: 222 kg (489 lb)
Fuel system: D4-S direct injection
Compression ratio: 11.8:1, 12.3:1
Block material: Die-cast aluminum