Reflecting Lexus’ ongoing commitment to the pursuit of perfection in automotive quality, performance, technology and refinement, the RX model range has consistently topped the JD Power and Associates annual awards, winning the IQS (Initial Quality Study) category in 2001, 2003, 2004 and 2005, as well as the APEAL (Automotive, Performance, Execution, Layout) category in 1998, 2003, 2004 and 2005. The new, 2006 Lexus RX 350 further refines driving pleasure through the classleadng performance of a new 3.5 litre V6 petrol powerplant. Mated to an ultrasmooth, 5-speed automatic transmission, this outstanding unit offers power and torque increases of 53kW/71DIN hp and 59Nm respectively over the previous RX 300, whilst simultaneously reducing fuel consumption by some 8%. Enhanced Noise Vibration and Harshness measures guarantee a marked reduction in noise levels at all vehicle speeds, whilst the new luxury SUV also features a new Mark Levinson® Premium audio system, as well as a new, high-speed Lexus Navigation System. The highly compact, all-aluminium, chain-driven double overhead camshaft, 24 valve, 3,456cc V6 petrol engine features Dual VVT-i (Variable Valve Timing-intelligent) - an optimised variable intake and exhaust valve timing system- to achieve the perfect balance of high performance with low fuel consumption and emissions. A two-stage intake system featuring high efficiency ports with oblique spray injectors switches the air inlet path in accordance with driving conditions to both enhance performance and reduce noise. The port diameter and length have been optimised to improve output and torque, whilst an electric Acoustic Control Induction System (ACIS) adjusts the intake pipe length according to engine rpm, further boosting torque. Pentroof combustion chambers combine with iridium, high-ignitability spark plugs for excellent combustion and anti-knocking performance. Roller rocker arms have been adopted for the chaindriven valve system, the marked reduction in friction between the cam and sliding components -15% at 2,000rpm- helping enhance fuel efficiency. In addition, the diameter of both intake and exhaust valves has been enlarged, whilst a concave camshaft profile increases valve lift to boost output. The system requires no valve clearance adjustment over the life of the vehicle. Within a stainless steel exhaust system, gas flow has been optimised to reduce exhaust pressure loss and enhance performance. And a catalyst-integrated exhaust manifold features ultra-thin-plate ceramic catalytic converters to further improve performance, significantly reduce warmup times and, hence, reduce emissions. Extensive measures have been taken to maximise weight reduction within a remarkably compact powerplant design. The new V6 employs an aluminium die-cast cylinder block and intake manifold, lightweight pistons and a resin-made intake chamber. The overall engine assembly is made lighter and more compact through the installation of the water pump, oil filter and oil pump within the chain cover. The new 3.5 litre V6 develops 203 kW/276 DIN hp @ 6,200 rpm and 342 Nm of torque at 4,700 rpm, awarding the new Lexus luxury SUV performance figures of 0-100kph in just 7.8 seconds, class leading in-gear acceleration and a top speed of 200 kph. With C02 emissions of 264g/km, the highly sophisticated 3.5 litre unit returns an outstanding 11.2 L/100km in the combined cycle. ECT AUTOMATIC TRANSMISSIONAND 4-WHEEL DRIVE Equipped with Engine Torque Prediction, a Shift Phase Controller, a newly developed, high-efficiency torque converter and precise hydraulic control of the gearshift mechanism, the new transmission’s wide range gear train promotes superior performance and excellent fuel economy. The gearbox is able to execute multiple down-shifts on throttle kick-down –for example, from 4th to 2nd gearwithout the need to shift through intermediate ratios, significantly reducing downshift times, eliciting an even smoother gearshift and greatly enhancing throttle response. Moving the gearshift across activates a sequential-shift system, offering enhanced engine braking, precise control and greater driving involvement. The RX 350’s full-time 4-wheel drive deploys an even 50:50 torque split between front and rear wheels via a simple, compact and highly rigid transfer system, featurig a bevelled gear centre differential for optimum weight reduction. The RX 350’s adopts a new centre differential featuring a viscous coupling. The limited-slip function inherent in this system not only promotes the smooth delivery of the increased horsepower generated by the new 3.5 litre V6, but also, allied to Vehicle Stability Control (VSC), further enhances traction and stability under all driving conditions.
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