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2010 Lexus RX 450H Rear Three Quarters View

Diesel and Hybrid SUV Comparison: 2009 BMW X5 xDrive 35d vs 2010 Lexus RX 450h vs 2009 Mercedes-Benz ML320 BlueTEC vs 2009 Volkswagen Touareg TDI

2010 Lexus RX 450H Front Three Quarters View

Yet it's impossible not to be impressed by the Lexus. Hitting the engine-start button is like pushing the I/O button on the latest quad core PC. Thrums, whirrs, and blinking lights provide the sensation of a complex artificial intelligence booting up.

Light throttle touches send only electrons to the front and rear motor/generators and result in the hush of rolling rubber. Full throttle wakes the 3.5-liter V-6, but you'd never know. With the CVT droning, it's nearly impossible to pick up exactly when the engine fires up to help things along; there are no additional vibrations and only the slightest auditory cues.

2010 Lexus RX 450H Rear Three Quarters View
Enough computing power to... 
   
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2010 Lexus RX 450H Rear Three Quarters View
Enough computing power to rival a Google server farm, but cargo room compromised for hybrid system.

That's just a taste of the Lexus's slickly integrated technology. Everywhere you look, the RX 450h is awash in electronic goodies, from the crisp, organic LED display to headlamps that automatically douse their high beams for oncoming traffic to a game-changing telematics controller called Remote Touch. Like a cross between a touch screen and trackball, it allows the user to actually feel the pointer contact icons and virtual buttons. It's spooky at first, but quick to win converts. "Remote touch does just as its name implies, imparting a rewarding sense of feel and touch as you swirl the 'mouse' over the screen. Locks neatly into the various menu buttons, and generally works intuitively," says St. Antoine. Williams is equally impressed, "If every vehicle gets something like this in 10 years I won't be surprised."

In comparison, both the BMW and Benz feel low-tech and spare. The X5's austere, all-black cabin incites the most complaints: "Somber cockpit and I still hate the iDrive interface, especially when controlling the nav, a deal-breaker in my book," says Kiino. St. Antoine gently backhands the Benz cabin, "Perhaps not as chic as the VW's, but this is a nice room, too. Some of the controls work deftly-the climate system, for instance-but others are simply horrible."

2010 Lexus RX 450H Front View

While floored by its low-cost/high-feature set, our judges were split on the Lexus's overall execution. Some found it a futuristic, techno tour de force, others a modern, yet cheap, mishmash. Williams notes, "Not hot about the exterior design-front nose looks rather unfinished-but the thought and execution of the interior is amazing. Every surface and shape appears sculpted in order to create as much space and visibility as possible. St. Antoine is not so impressed: "Interior is really missing that 'premium' feel you expect of a Lexus. The center console feels downright cheap."

Not so for the Touareg. Kiino likens its cabin to "a den in a ritzy Alaska fishing lodge," while St. Antoine gushes, "What a gorgeous environment for conducting the business of driving. The Touareg has a very serious feel, yet still manages to look stylish and inviting. See, BMW? It can be done."

2010 Lexus RX 450H Dash Display
2010 Lexus RX 450H Controls


2010 Lexus RX 450H Interior View
2010 Lexus RX 450H Engine


2010 Lexus RX 450H Engine
2010 Lexus RX 450H Trunk Space



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Community Comments

Edward A. Sanchez  (03/05/09 10:13 AM)

I'm a big fan of diesels in general, but I think they especially make sense for light trucks and SUVs. I'm frankly surprised why we haven't seen more diesel SUVs pop up in the past year or so. I think "hybrid" has become such a buzzword, that people think they want it without truly understanding how the technology works, and what its limitations are.

rich73  (03/22/09 09:30 AM)

I am (for my wife) currently in the market for these type of vehicles and with this comparison, I am more confused.  I was leaning on the BMW X5 35d but it came last place? I know the price is steep (with boxes ticked off) which is my biggest issue.   The Touareg will now be something we really need to look into.   Still not ready for the hybrid thing due to long term reliability, which then questions the Touareg which is rated as per Consumer Reports report as "has consistently been well below average."  

I am leaning towards the FX35 currently for it's sporty attributes.   Less cargo room, but I've got a TRD Tacoma which will take care of those issue (most of the time).

My wife really likes the X5 or MDX.

The search continues.

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