The Toyota LR Series Engine
The Toyota LR engine was developed in cooperation with long-time partner Yamaha for the exclusive Lexus LFA supercar. The only engine in the LR Series so far is the 1LR-GUE, which is a V-10 aluminum, magnesium, and titanium alloy power plant made to be smaller and lighter than most eight-cylinder engines. The engine is very technologically advanced with titanium valves and an independent, electronically-controlled throttle body.
The 4.8-liter 1LR-GUE has an output of 560 PS and 480 Nm of torque with 90 percent of that torque available from 3,700 rpm to 9,000 rpm. Max RPM is 9,500. Bore is 88mm and stroke is 79mm and the compression is high at 12:1.
The 1LR-GUE was first designed in the early 2000s and was a finished product when it appeared in the LF-A concept in 2007 and went into production in 2008 for the 2009 introduction of the new Lexus LFA, which was a 2010 model year and was produced until 2012. There are rumors that Toyota is working on another supercar and the second-generation of this engine series will be featured there. Only 500 LFAs were made.