The Lexus "LS" luxury sedan, which Toyota Motor Corp released in October 2017, comes not only as a hybrid vehicle but also as a vehicle equipped with a newly-developed 3.5L V-6 direct-injection twin-turbo gasoline engine.
Toyota drastically improved the fuel efficiency of the vehicle while increasing torque by employing its new common combustion technology. The company realized a high thermal efficiency and improved output and fuel efficiency. The maximum thermal efficiency of the Lexus LS is 37%.
With the 2.5L four-cylinder gasoline engine of the Camry, Toyota realized a thermal efficiency of 40%, which is the world's highest for an engine vehicle (41% for HEVs). As the number of cylinders increases, so does frictional loss, lowering thermal efficiency. While the newly-developed V-6 engine is supercharged, its efficiency is only 3 points lower than the efficiency of Toyota's naturally-aspirated four-cylinder engine. It is probably the world's most efficient supercharged gasoline engine of the class.
The new V-6 engine, "V35A-FTS," is combined with Aisin AW Co Ltd's 10-speed automatic transmission (AT). Its maximum torque and maximum output are 600N·m and 310kW, respectively, which are higher than those of the previous LS' 4.6L naturally-aspirated V-8 engine (500N·m and 288kW).
The new LS also features a high fuel efficiency. While the two-wheel-drive (2WD) model of the LS (LS500) is 2,150kg in mass, its fuel efficiency is 10.2km/L (approx 24mpg) under the JC08 test mode. The fuel efficiency of the previous model (LS460, 2WD, 1,950kg) is 8.4km/L under the JC08 test mode.