The Good: The 2007 Subaru Legacy 2.5 GT spec.B takes the performance of the 2006 GT Limited and sweetens the pot with a three-mode engine-management system ("SI-Drive"), touch-screen navigation, satellite radio, and sporty interior upgrades. The Bad: Bluetooth cell-phone control remains unavailable. SI-Drive can produce some unnatural hesitation under acceleration in the low-performance setting. The Bottom Line: The 2007 Legacy spec.B includes standard interior tech options to match its sophisticated chassis, making it a more well-rounded contender than Subaru's cheaper 2.5 GT Limited. The spec.B makes a solid case for the four-cylinder performance sedan, even though it's priced similarly to its mostly six-cylinder competition. 2007 Subaru Legacy 2.5 GT spec.BPhoto gallery:2007 Subaru Legacy spec.BWith the pleasant memory of our recent stint in the 2006 Subaru Legacy 2.5 GT Limited still fresh in our minds, we looked forward to the arrival of the top-of-the-line 2007 Legacy 2.5 GT spec.B to the CNET garage. We weren't disappointed, as the spec.B offers all the Limited's performance while also including some gadgets that were absent from the 2006 model. That said, we didn't get everything we hoped for, as the important Bluetooth option is still missing, and the satellite radio kit requires a stiff $456 buy-in (subscription not included). But Subaru's familiar touch-screen system--which incorporates navigation, trip computer and maintenance interval controls--works as well in the Legacy as in the less-inspiring B9 Tribeca where we encountered that system most recently. The sound system in the spec.B is enhanced with the simple additions of an auxiliary-audio input and MP3\/WMA playback capability for the CD changer. Our test car maintained the same low profile we appreciated in the 2.5 GT Limited, with no garish body add-ons drawing attention to its dark-gray metallic paint. The spec.B has more aggressive 18-inch wheels and rubber, but the simple multispoke design is in keeping with the car's overall clean look. For drivers looking to fly under the radar with confidence-inspiring all-wheel-drive performance and enough interior amenities to justify the cost, the spec.B is a very solid mount. Stick shift models get navigation The interior of the Legacy spec.B is where the main improvements over the 2006 Legacy are found. As we noted in our review of that car, navigation was an available option but required the SportShift automatic transmission, so we contented ourselves with the five-speed and called it even. Luckily, no such compromise is required in the spec.B, and in fact, an extra cog is thrown into the manual transmission to boot. The navigation system remains one of our favorites due to its relatively stripped-down touch-screen interface and ability to detour and recalculate routes rapidly. Destination entry is possible via text input from an on-screen keyboard, by using a points-of-interest database or simply scrolling and pointing on the map. Setup of the many split-screen options is intuitive, as is control of the other systems accessed through the nav screen: the trip computer, the maintenance monitors and various mileage, the calendar and the calculator functions. Subaru's stripped-down touch-screen navigation interface remains one of our favorites.One aspect of the cabin electronics that disappointed us was the lack of integration between the expensive satellite radio kit and the main display. For both XM satellite radio and CDs that include the information, we found the artist, the album and the song title are limited to a single-line display on the stereo face. Long entries are cut off, and toggling through the categories is too distracting. The stereo's power is modest at 100 watts and six speakers, but the in-dash six-CD changer played our burned MP3- and WMA discs with no trouble. We also enjoyed using the aux jack to play tunes from our MP3-playing Sony Ericsson k790a. The jack is under the lidded center console, but a notch in the bin's rim allows the cord to pass through and the phone to be available while in use. Curiously, artist, title, and folder navigation were displayed with only the WMA disc, not from the MP3 sources. Information on audio files is limited to a single line of information.From a nontech standpoint, the interior also impresses. Sport seats with power adjustment (8-way driver, 4-way passenger) are standard, and come wrapped in dark leather with contrasting "Dusk Blue" Alcantara inserts on the main surfaces. This is the only interior color combination offered for the spec.B, but fortunately it looks better than it sounds. An elegant three-spoke Momo steering wheel with basic audio controls and aluminum pedals round out the purposeful spec.B interior upgrades. A tilt-sliding moon roof, all-weather package with heated seats and mirrors, and dual-zone climate control are standard. Boxer handles itself well As we'd experienced during our initial miles in the 2006 Legacy, we found ourselves wondering why the Legacy spec.B costs so much on a per-cylinder basis. At a tick over $35,000 for our XM-equipped version, the spec.B is creeping into base-model (rear-wheel drive) BMW 3-series territory. The answer comes after a few quick corners and space to rev the engine into its turbocharged power band. The combination of all-wheel drive with the relatively low weight and center of gravity allowed by the horizontally opposed, four-cylinder boxer engine layout make for a four-door sedan that feels tossable but rarely loses its composure. At a media event earlier this year, CNET editors had the chance to try out a rare 2006 spec.B on the back roads around Hollister, Calif., and during a brief two-lap blast at Laguna Seca. On the track, the four-cylinder's lack of low-end grunt was very apparent--although our perception may have been mildly skewed following our earlier ride with BMW sports-car driver Joey Hand in an M5. But on public roads where corner exit speeds aren't vital, the spec.B acquits itself very well. The 2.5-liter flat-four does want a fair bit of revving, only generating its maximum 243 horsepower at 6,000rpm. Its torque peak comes on a bit sooner, with all 241 foot-pounds available from 3,600rpm, but the spec.B and its six-speed manual transmission encourage enthusiastic driving, and this takes it toll at the gas pump. The spec.B is EPA-rated at 19mpg in the city and 26mpg on the highway, but in our (admittedly rev-happy) time with the car, it averaged a meager 13.5mpg according to its trip computer. In a week of spirited driving, we averaged only 13.5 mpg.New for 2007 is Subaru Intelligent Drive (SI-Drive), a three-stage, driver-controlled engine-management feature. In the most sedate "Intelligent" mode, the power and torque peaks are lowered and the throttle response is lazier, which is good for use in traffic or on less grippy surfaces. In "Sport" mode, performance is similar to the 2006 spec.B (according to Subaru). Finally, the "Sport Sharp" mode quickens the electronic throttle mapping for an immediate response and the best possible performance. In all SI-Drive modes, the active valve timing optimizes engine breathing. SI Drive gives drivers the ability to switch between different levels of throttle responsiveness.We found the Sport mode adequate for most real-world situations in our test car, with while the Sport Sharp (or "S#" on the LCD display in the tachometer) mode did not provide a noticeably different experience. The Efficiency mode produces unwanted hesitations and flat spots under acceleration and activates a green up-shift arrow in the tachometer--and together these annoyed us enough to stay with Sport. The special sport suspension, featuring Bilstein shocks, is tuned well for aggressive driving but doesn't get harsh over bad pavement. The six-speed manual transmission was pleasant to use, and we found the extra gear very welcome for freeway cruising. AWD + VDC + ABS = solid safety tech The 2007 Legacy 2.5 GT spec.B makes good use of safety technology, which works in concert with its performance-based features. The symmetrical all-wheel-drive system works at all vehicle speeds to send power to the wheels with the most grip. Like the 2006 spec.B, the 2007 model has a viscous-coupling lockable center differential, which sends torque 50-50 front and rear until any slippage occurs. New for 2007, a Torsen limited-slip rear differential further enhances traction and stability. A traction control system on the spec.B called Vehicle Dynamics Control compares steering and braking inputs to determine the intended path and then applies the brakes selectively and\/or reduces power to compensate for any sliding. VDC can be switched off with a button to the left of the steering column. Dual front airbags with passenger-seat occupancy detection and seat-mounted front side-impact airbags help the 2007 Legacy garner five-star NHTSA ratings for both front- and side-impact crash ratings. Tire-pressure monitoring is standard, along with the expected four-wheel ABS, electronic brake-force distribution, and daytime running lights. Subaru's warranty for the 2007 Legacy spec.B is for three years or 36,000 miles and includes roadside assistance. With a base MSRP of $34,620 including destination charge, the 2007 Subaru Legacy 2.5 GT spec.B is one of the higher-priced four-cylinder cars out there. But with all-wheel drive and a decent roster of tech amenities included, the spec.B offers good overall value and a stealthily potent driving experience. Heavier six-cylinder competitors like the BMW 3-series and Nissan Maxima can't match the light-on-its-feet agility of the Legacy, and the spec.B's sport-oriented cabin enhancements strike the right notes. With the aforementioned XM satellite radio option and a $42 set of wheel locks, our test car's total price came to $35,118. The additions of XM radio, MP3\/WMA playback and the navigation system increased our Comfort rating for the 2007 Legacy spec.B by a point over the 2.5 GT Limited that lacked these features. The spec.B is pricier than the 2.5 GT Limited but offers enough to make the premium worth it.