Driving impressions: 2010 Lexus RX 350, RX450h — CNET

14 Июн 2015 | Author: | No comments yet »

Driving impressions: 2010 RX 350, RX450h

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Lexus RX 450h Lexus

editor Wayne Cunningham has the new styling and cabin features of the Lexus RX 350 and RX 450h. So I’ll on the drivetrain and chassis changes.

just say that, at Lexus, The Pursuit of Perfection is not merely hype.

Lexus has obviously doing something right its RX, as the midsize luxury crossover is its vehicle, and the one that defines the luxury crossover segment. But was room for improvement in both the and powertrain departments. The two previous had suspension tunings best-described as middle-of-the-road American—soft for comfort, and plenty of body roll in moderate cornering. Steering was a on the light side, too.

a generation growing up in sport-compacts is a difference. Lexus does at as much customer clinic as anyone, and changes products And the new RX has a much better suspension than its forebears, for improved and a better driving experience no reduction of comfort. The rear change, from struts to wishbones, may get some credit—as as extra credit for less into the cargo area and so cabin space—but revisions in and shocks rates and careful of all suspension components and use of speed-sensitive power steering results in a that is as responsive as many a sedan, with very turn-in and minimal body even when requested to do an imitation. No, really! No harshness, no no fuss, no muss. and handling is also a very important factor. The crash you can avoid is one you have.

Improvements in aerodynamics from the new and careful management of underbody really aren’t skid underneath the RX, that sheet is there for the same reason cars don’t have hanging out underneath, air management—help wind and road noise, and sheeting and plastic materials placed and tuned to cancel out at those spots help road noise even Polyester felt fender eliminate pings from thrown up into the wheel Details, details. must be a

And so the interior, in addition to being ergonomically wonderful, and comfortable, is relaxingly quiet. The trackball-like for the navigation, information, and audio is the polar opposite of the counterintuitive found in German luxury If you’ve ever used a mouse or trackball or video controller, no explanation is necessary and no to a 100-page manual.

Drivetrains of the gasoline V6 RX 350 and gasoline-electric hybrid RX have been upgraded. The 350 a bit more power out of its namesake engine—five more horsepower and more pound-feet of torque—but now goes through a six-speed transmission. Lower first- and ratios improve acceleration, closer third through ratios and a higher overdrive in improve driving characteristics and economy. It’s quiet and on the road, as expected. But when the gets challenging or there is a to change direction quickly, the new RX follows orders, with no roll or resistance to directional

More impressive was the RX 400h the newest version of the Lexus Drive. It’s handling if anything, even better the 350’s, despite an extra 300 of mass. The previous RX Hybrid had inconsistent and nonlinear throttle resulting from changes in mode. There was a noticeable when the gas engine came on being stopped at a light or in and the addition of electric motor during acceleration sometimes more power than by throttle movement. None of was serious, or even as bad as the non-response of an old era slushbox automatic or long-lag from the ’80s, but it did preclude the from being a true vehicle.

LEXUS RX350/450H

Not any more. Because the thumps and are gone. If anything, the Hybrid is than its gasoline-only sibling. And more powerful as well as fuel-efficient. X amount of pedal gets y amount of acceleration, No surprises.

What’s changed? If the of the Lexus/Toyota hybrid system are the all details are next-generation and mostly smaller, and more efficient.

The is a derivative of the 3.5-liter V6 in the RX 350, but it on the Atkinson cycle (like the Prius), not the Otto cycle of the old RX That’s more efficient, and efficiencies come from new gas recirculation and exhaust heat systems that allow warmup and eliminate the need for enrichment to cool the catalytic The heat recovery system the engine to be shut off sooner a cold start, and more too.

An improved flywheel damper is the to the smoothness of mode transitions in the A two-step torque-absorbing mechanism shocks from engine to a negligible amount and is the chief to the RX 450h’s driveline refinement.

for the hybrid is up, from a combined 268 to a 295 horsepower. That bests the RX 275. Both come in or all-wheel-drive form, but AWD systems are That on the RX 350 is a new electronically activated system that is lighter and efficient than previous systems. As before, the AWD hybrid a separate rear motor-generator to provide power to the rear when needed.

The RX 350 goes on sale in February, the hybrid following a couple of later. Prices have not announced at the time of writing. to see the enhancements to the hybrid system in Toyota and Lexus hybrids as

LEXUS RX350/450H
LEXUS RX350/450H

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