The Good: The 2006 Honda Accord Hybrid's electric-motor-assisted 3.0-liter V-6 gives it plenty of poke on the highway. Honda's excellent navigation system is a useful friend to talk to in the cabin. The Bad: In testing, the 2006 Honda Accord Hybrid proved to be less efficient than the gasoline-only EX. The Accord's disappointing stereo system lacks playback options and delivers inferior sound quality. The Bottom Line: A comfortable, stylish car with limited audio components, the 2006 Honda Accord Hybrid is a pleasure to drive when it gets going, but with a higher price tag and lower gas mileage than the 2006 Accord EX, potential buyers will question the wisdom of buying one. The 2006 Honda Accord Hybrid rewrites the hybrid-car playbook in more ways than one. A strapping 3.0-liter V-6 egged on by an electric motor puts out 253 horsepower, making the Hybrid more powerful than its V-6, gas-only 2006 Honda Accord EX stablemate. However, before we start popping the organic champagne, the financial and environmental cost of this enhanced performance requires closer inspection: In our road test, the Hybrid did significantly worse than the gas-only model when it came to gas mileage.Low-end performance on the 2006 Honda Accord Hybrid is sluggish in large part due to the car's Idle Stop system, an energy-saving feature that could use some refining for future models. Aside from its hybrid technology, the Accord Hybrid has an impressive arsenal of tech under the hood, including Honda's i-VTEC variable-valve-timing system.With specially designed alloy wheels and some neat body-styling touches, the Hybrid Accord looks handsome from the outside, and the aesthetics continue into the cabin, with a swish leather-trimmed interior.Our test model was equipped with Honda's exceptional navigation unit (a worthwhile $2,000 option), which was a pleasure to boss around. A hybrid dual-zone climate-control system is also a nice touch. Less impressive is the 2006 Accord's audio system, which comes with no MP3 capability unless purchased in the shape of an optional player or an optional dedicated iPod dock. With the nav unit and a $550 destination charge, the 2006 Honda Accord Hybrid comes in at $33,540.Leather seats and premium interior accents greet the driver on entering the cabin of the 2006 Honda Accord Hybrid, the latter consisting of brushed-metal-looking plastic trim on the doors.The star of the cabin, however, is the Accord Hybrid's optional navigation system, which can be operated--along with the Accord's six-disc CD changer and climate-control system--by voice commands or via a touch screen in the dash. This has to be one of the best factory-installed, voice-activated navigation units on the market. Without so much as a glance at the instruction manual, we were able to ask for directions (just say "navigation" for navigation--simple but beyond the capabilities of some automakers) and set our course by address, cross street, or point of interest. With spoken street names, the Honda voice-recognition system almost invariably turned up our intended destination as the first choice on its list, simply requiring our confirmation to plot a route.Inputting data via the touch screen was a little less intuitive, especially seeing that our car's LCD touch pad was apparently misaligned, forcing us to press the screen some way to the right-hand side of the required letter. Other niggles we had with the LCD navigation interface include its tendency to present us with a list before we entered sufficient details, meaning that we had to either back up or spend ages trawling through irrelevant options.Honda's voice-controlled navigation unit is a joy to boss around.As well as voice and touch capabilities, destinations can be entered by pointing to them using a crosshair controlled by a joystick at the base of the LCD. Despite some programming glitches, with the destination in its sights, the Honda nav system's spoken voice directions are excellent. Text-to-speech functionality enables the system to call out the names of streets and routes, and at busy intersections, the voice guidance will maintain a running commentary--advising the driver to "keep left," "keep right," or "continue to follow the road"--even when there are no immediate turns pending.In addition to its remarkable ability to understand and process directions, the 2006 Honda Accord Hybrid's voice-recognition system can process and respond to spoken requests for the current time, as well as changes to the cabin temperature, the stereo input, or the satellite\/FM\/AM radio channel. Readouts for the current driver and passenger temperatures, as well as the current satellite-radio artist and track name, are usefully displayed on a separate two-tone LCD on top of the dashboard. The audio system can be controlled via the in-dash LCD, as can the car's trip computer, which displays a scientific-looking real-time chart of the car's current gas mileage (see the Performance section for detailed--and surprising--information on this).Due to the Honda's unique Idle Stop feature, which cuts the combustion engine when the car comes to a halt, the Accord's dual-zone climate-control system is also hybridized. Usually powered by the car's gasoline engine when in motion, it switches over to an electric-motor power source when the car is in Idle Stop mode--a feature that ensures Honda Hybrid drivers stuck in traffic don't have to suffer extremes of temperature for their choice of ecofriendly automobile.As well as its engine, the car's climate-control system is hybridized and can be powered by either the engine or an electric power source.The major drawback of the 2006 Honda Accord Hybrid's interior is its disappointing standard audio system. The standard six-CD in-dash changer offers no MP3-CD playback option, and an auxiliary input jack is nowhere to be found. Owners of the Accord Hybrid wishing to listen to 21st-century music formats can do so but will have to fork out either $544 for an optional in-dash MP3\/WMA player or an extra $199 for Honda Music Link, which allows iPod docking and playback. The fact that these features are optional is pretty disappointing, especially for a car that has a base price (with navigation) of more than $33,000. Those who do bite the bullet and pay for the audio upgrades may also find themselves ruing the decision, as the Accord's six-speaker stereo system's sound quality is mediocre at best. Bass is distorted at any volume approaching halfway, and lack of fine detail means that XM's classical channels are best avoided.Before one fires up the engine of the 2006 Honda Accord Hybrid, it is almost impossible to tell that the car is a dual-source vehicle. When the engine is off, there are none of the "I'm a hybrid!" fixtures that come with the 2007 Toyota Camry Hybrid, with which this car will almost certainly be compared and contrasted by hybrid family-sedan shoppers. When we put the key in the ignition and turned the 3.0-liter V-6 over, we needed to make sure we hadn't mistakenly gotten back into the Honda Accord EX. When brought to life, however, the cabin starts to feel a bit more hybridized.A backlit Integrated Motor Assist (IMA) logo nestled in the center of the speedometer informs the driver that this car uses Honda's dual-source propulsion system, which, unlike Toyota's Hybrid Synergy Drive, is designed primarily to allow the electric motor to assist--rather than replace--the car's internal-combustion engine. The Accord Hybrid is rated as an Advanced Technology Partial Zero Emissions Vehicle (AT-PZEV) and so must run on an electric-only power source at some point (downhill in a hurricane, perhaps, as someone suggested), but there is none of the noiseless inner-city stealth driving that comes with the 2007 Toyota Camry Hybrid.The 2006 Accord Hybrid runs on Honda's Integrated Motor Assist technology.The 2005 Honda Accord Hybrid--this car's immediate predecessor--was the first car to be referred to as a muscle hybrid, due to its ability to balance environmentally friendly technology with solid performance, and the 2006 model follows in this tradition. The IMA system adds a 12kW electric motor to the Accord's gasoline engine to provide additional torque when needed and to increase overall energy efficiency by recapturing energy from deceleration and braking, which is then stored in the nickel-metal-hydride battery. With 253 horsepower, this car will have drivers of the 2006 Chevy Impala and the 2006 VW Passat rubbing their eyes in disbelief when they notice the V6 Hybrid motif on the tailgate as the Accord shoots past on the freeway.While the 2006 electrically assisted Honda Accord Hybrid puts out 9 more horsepower than the 2006 Accord V-6--giving Honda the bragging rights as the first manufacturer to offer a more powerful hybrid model than its gasoline-only equivalent--one of our editors observed that the Hybrid feels less punchy than the regular V-6 EX. In our experience, the Hybrid performed competently on the highway, where it cruised at just more than 2,000rpm, but it did suffer from low-end lag and Hybrid jitters when accelerating from standing.This was principally attributable to the fact that the engine not only has to engage when pulling off but actually also has to switch itself back on, due to the Idle Stop feature. Designed in the energy-efficient vein of the Hybrid drivetrain, Idle Stop cuts the engine when the Accord comes to a complete stop with the car in drive mode and the brake depressed. While the car temporarily hibernates, a light in the instrument panel marked Auto Stop flashes green--a somewhat superfluous notice, as most drivers will be able to surmise that the car has cut out from the sudden lack of engine noise. The most noticeable result of Idle Stop, however, is when the stoplight turns green and the Accord Hybrid wakes up with a driveline jolt that hinders fast getaways and brings down the overall driving experience of the car--certainly something for the Honda engineers to work on for future models.The most surprising thing about the 2006 Accord Hybrid's performance is its relatively weak gas mileage. Despite what the EPA says--25mpg in the city and 34mpg on the highway--we observed an average of 23.5mpg in mixed metro driving. Not only is this far worse than the gas mileage for the 2007 Camry Hybrid (35mpg in the same conditions), but it is even lower than CNET's observed mileage for the gasoline-only 2006 Honda Accord EX, which got an overall reading of 24.9mpg on a trip down Southern California's notoriously congested I-5.Our overall observed gas mileage for the 2006 Accord Hybrid was worse than that of the gasoline-only V-6 Accord EX.One of the possible explanations for these surprising results is the difference between the transmission systems in each car. While our test EX has a six-speed manual enabling in-town flexibility and sixth-gear cruising, the Hybrid was constrained by its five-speed automatic gearbox, which limited its options in town and gave it little room to stretch its legs at highway speeds. Whatever the reason, our readouts will be grist to antihybrid mill.In addition to its hybrid technology, the 2006 Honda Accord boasts a range of other advanced systems to enable it to maximize performance and efficiency. These include Honda's i-VTEC system, which uses an advanced valve-control system to adjust valve overlap and therefore the amount of intake charge reentering the intake manifold. Different levels of overlap are employed, depending on whether the car is cruising or accelerating, to maximize torque and minimize emissions.The i-VTEC's Variable Cylinder Management, which activates and deactivates the three rear cylinders as needed, and Honda's Grade Logic Control, which calibrates the automatic transmission to avoid gear hunting when the car is on an incline, all mean that the Accord Hybrid is a tech superstar under the hood. It's just a pity that it doesn't seem to work as it should.The 2006 Honda Accord Hybrid comes equipped with a respectable number of active and passive safety features, including ABS and vehicle stability assist (VSA) with traction control, which is designed to compensate for lack of control by applying brake force to counter wheel slippage or oversteer. Driver and front passenger both get dual-stage front-, side-, and side curtain air bags, and Honda's occupant-position detection system deactivates the front-passenger air bags when necessary.The 2006 Honda Accord Hybrid also comes with the LATCH system to enable child seats to be firmly fastened in the rear. In NHTSA testing, the Accord Hybrid scored an admirable five stars for front impact and four stars for both side impact and rollover safety. It comes with Honda's five-year\/60,000-mile limited power train warranty and an eight-year\/80,000-mile warranty for its battery pack. Honda expects that the Accord Hybrid will complete its first 100,000 miles with no scheduled tune-ups.