A new 4.0 liter V8 engine, 1UZ-FE, has been developed for the luxury sedan, LEXUS LS400. The engine has 4 camshafts and 32 valves, and weighs only 195 kg (430 lbs) having many light alloy components and carefully designed configurations.
The appropriate engine displacement and high technology adopted throughout from design to manufacturing process enable the LS400 to run powerfully with excellent fuel economy and a pleasant sounds.
It develops 250HP at 5600 rpm and 260ft-lbs of torque at 4400 rpm, and its fuel economy figure, well exceeds the EPA's tax charge level of 22.5mpg. These figures have been achieved through the newest technologies applied to every part of the design, such as:
Well studied intake and exhaust systems, centrally located spark plug in the TOYOTA original four-valve combustion chamber, which has a narrow valve including angle, and low friction components like aluminum alloy valve lifters and well balanced moving parts.
Light weight and low engine noise are accomplished by a rigid designed aluminum alloy cylinder block and oil pan, precisely controlled balancing and metal clearances, hydraulic engine mountings, and directly installed accessory parts.
A long life timing belt, auto tensioners for the timing and accessory drive belts, built-in ignition systems, platinum spark plugs, and anti-rust treatment on every component give the engine long life and maintenance-free features.
Citation: Nakamura, Y., Kinoshita, T., Dohi, Y., Hattori, K. et al., "A New V-8 Engine for the LEXUS LS 400," SAE Technical Paper 892003, 1989, https://doi.org/10.4271/892003. Download Citation
