Besides the usual minor exterior and interior tweaks that are done to the current generation, the GS line-up now gets the brand new turbocharged engine in the GS 200t variants. These variants replace the GS 250 variants and though the engine size is smaller, the performance capability, thanks to turbocharging, is more effective.
The 2.0-liter engine is the first turbocharged engine used by Lexus. The 4-cylinder petrol engine (coded 8AR-FTS) was developed by Lexus in-house and has a twin-scroll turbocharger which, together with an intercooler, delivers 241 hp at 5,800 rpm with a maximum of 350 Nm of torque from 1,650 rpm to 4,400 rpm. These outputs represent 17% more power and 38% more torque compared to what was produced by the 2.5-liter engine in the previous GS 250.
The 8AR-FTS engine achieves its impressive output with features such as a water-cooled cylinder head, integrated exhaust manifold, and Variable Valve Timing intelligent – Wide (VVTi-W) which allows the engine to switch between the Otto and Atkinson cycles according to driving conditions.
The innovative engine also has the D-4ST (Direct injection 4-stroke engine Superior version with Turbo) fuel delivery system which combines a high pressure fuel system for injection directly in to the cylinders with a low pressure system for injection into the ports. Injection is split between the direct and port injectors according to the engine load to help fuel economy.
Power is transferred to the wheels via an 8-speed Sports Direct Shift (SPDS) transmission, a first for Lexus. This advanced transmission offers refined operation with smooth transitions between gears to enhance the feel of linear acceleration. A swing damper is adopted to expand the lock-up range. This damper allows for lock-up from the low engine rpm range between the 3rd and 8th gear, thus contributing to excellent fuel efficiency and achieving a direct feel. Other gearbox related enhancements include Uphill Downshift Control and Downshift Lock-up Control.
For owners who want better fuel consumption, there is a Power Saving Control which controls solenoid valve power consumption and also the amount of power generated by the alternator. These contribute to lower fuel consumption, especially at cruising speeds.
The GS 350 and GS 300h variants continue using the same engines as before but with improvement to improve fuel efficiency. The 3.5-liter V6 2GR-FKS engine in the GS 350, with direct injector that inject fuel directly into the cylinder together with port injectors, offers a class-top level of engine performance while the intake and exhaust have been tuned for realizing enhanced output. As for the Lexus Hybrid Drive used in the GS 300h, the 2.5-liter 2AR-FSE 4-cylinder engine gets the next generation D-4S electronic fuel injection system which operates at a higher pressure.
The Lexus GS offered by Lexus Malaysia includes a standard 3-year warranty, and the hybrid version GS 300h comes with an 8-year unlimited warranty.