The Navigator is now offered in two versions: the standard size, and an even larger, longer, Navigator L.With the exception of its 300-hp, 5.4-liter V8 engine and six-speed automatic transmission, everything inside and out has been thoroughly revised.It's still available with rear-wheel drive or four-wheel drive.

We'd call the 2007 Navigator an across-the-board improvement, except perhaps in the very subjective area of styling.Yet it's an incremental improvement, and it doesn't restore the clear edge Lincoln once had among full-size luxury SUVs.While Navigator hits the basic targets set for such vehicles, it's not loaded with emotional appeal.

The Navigator is essentially a truck, with a ladder-type box frame and separate body.As such, it's not as responsive, certainly not as sedan-like, as the unit-body sport-utilities proliferating at the high end of the market.But it's a smooth, quiet truck, with lots of noise- and vibration-mitigating technology and a fully independent rear suspension.

The Navigator also is very big.That means lots of passenger room and a full-size third seat, acres of cargo carrying space and impressive towing capacity.It's well equipped with safety features, including full-cabin head protection airbags, electronic stability control and a rollover protection system.Its styling seems deliberately retrogressive, probably in an effort to recreate the romance of Lincoln's glory days.Those who embrace the styling will find a nice finish inside, with rich wood and leather, and nearly all the bells and whistles available in luxury sedans.

With the upward trend in gasoline prices, big, luxurious sport-utility vehicles have lost some of their luster as a group.Still, the strengths that made them popular to begin with remain: real space for eight passengers, high bling factor and the comfort and convenience of an expensive sedan with the towing and load potential of a truck.The Lincoln Navigator shares those strengths at a competitive luxury-class price, and it doesn't even require premium fuel.

The Lincoln Navigator 4x2 ($45,755) and Navigator 4x4 ($48,655) come with features expected in the luxury class.Leather upholstery and a choice of Dark Ebony or lighter Anigre wood trim are standard.Two second-row captain's chairs also are standard, though a three-place split bench seat is available at no charge.

Standard features include a high-watt stereo with six-CD changer and auxiliary jack, three-zone automatic climate control with rear-seat fan and controls, leather-and-wood steering wheel with audio and climate controls, front seat position memory, power-deploying running boards, rear park sensor warning, roof rack, high-intensity discharge (HID) headlights, 18-inch alloy wheels, fog lamps and complimentary maintenance for one year.

The Navigator L 4x2 ($48,775) and Navigator L 4x4 ($51,655) are 14.7 inches longer than the standard models.Passenger accommodations are essentially the same, but the Navigator L provides an additional 25 cubic feet of cargo volume behind the third seat.

The most popular option grouping is the Ultimate Package ($2,000), which adds heated and cooled front seats, Lincoln's power-folding third seat, power liftgate and power moonroof.The Elite Package ($5,575) is the full ride, and includes a voice-activated navigation system, rear-seat DVD entertainment package with eight-inch screen, and the Preferred Appearance package, which adds custom seat stitching, contrasting piping and embroidered Lincoln logos.

The navigation system ($1,995) and rear-seat DVD entertainment ($2,485) are available separately.Other stand-alone options include Sirius Satellite Radio hardware ($195) with a six-month subscription, a remote starter ($445), 20-inch chromed wheels ($1,495) and a heavy-duty tow package ($595).

The Navigator's standard safety features meet the luxury-class baseline: dual-stage front airbags, front occupant side-impact airbags and curtain-style head protection airbags for all outboard seats.The curtain bags feature a rollover sensor, and all Navigators are equipped with Lincoln's AdvanceTrac anti-skid stability program.This system features Roll Stability Control, which uses a gyroscopic roll-rate sensor to enhance rollover resistance.Four-channel antilock brakes (ABS) and a tire-pressure monitor also are standard.

The Navigator remains what we'd call a truck.It's built on a pickup-style ladder frame, with a separate body bolted to that frame, rather than welded into one unit.But unlike most truck-based vehicles, the Navigator features a fully independent rear suspension, which tends to promote smoother ride and handling than the solid rear axle on the typical truck.

The Navigator L is nearly 15 inches longer than the standard model, extending its full length to almost 19 feet.The extra length does not significantly change passenger accommodations, however.Besides making this big sport-utility even more challenging to park, the Navigator L's additional size translates entirely into an additional 25 cubic feet of storage space behind the third seat.That extra space (by itself) is about 30 percent larger than the trunk in a full-size luxury sedan like the Mercedes-Benz S-Class or Lexus LS460.

In general, the 2007 Navigator looks longer than its predecessors, perhaps lower and even a bit sleeker.The basic shape is clean, if slightly bland.It's mostly sheer, tapered surfaces, consistent across the vehicle, with a chrome strip running below the windows.The profile is tidy for such a big vehicle, almost lean.Our issues with the styling rest in the details.

The ends of this sport-utility were clearly designed in Lincoln's new, retro-style brand theme.The eye is immediately drawn to the big, intricate grille in front.Its horizontal and vertical lines are supposed to inspire thoughts of Lincoln's Star logo, and the high-intensity beam headlights on either side add a jeweled, classy look.A second, thinner grille below the bumper replicates the bigger one above, flanked in this case by the fog lights.

The taillights could be lifted from Lincoln's MKZ sedan.They're shaped like wings that cut into the liftgate and wrap around the rear corners, with chrome edging and a hard contrast between the red and white sections.

The details seem to be an attempt to spice up an otherwise staid look, as if Lincoln is trying to out-bling popular competitors like the Cadillac Escalade.The optional chrome hood accent is basically a thick piece of chrome tacked on the end of the hood above the grille.We'd call it hideous, and find the Navigator much more attractive without it.We don't care much for the shiny steel plates at the bottom of the doors, either, but you might.Look at both options.

The Navigator comes standard with 18-inch double-spoke alloy wheels.The optional chromed 20-inch wheels aren't as disturbing as the chrome hood schnoz, and we like their size.They do, however, have an adverse effect on ride quality and interior noise.

Two exterior features have definite benefits.The outside mirrors are large, with repeating turn signals along the bottom edge and approach lamps underneath.The lamps light when the doors are unlocked with the remote key fob, and cast a nice circle of visibility around the doors.More than that, the big mirrors retract against the windows with the touch of a button.You'll appreciate this convenience when you pull a vehicle as large as the Navigator into a garage.

This Navigator also retains its trademark retractable running boards.When the doors open, these drop and extend about five inches, creating a step that makes climbing in and out easier.Now, they are more artfully integrated into the overall exterior design, almost impossible to detect when the doors are closed.

The Navigator interior may do that for some.For others, it may simply inspire memories of sitting in their parents' (or grandparents') behemoth sedan in the early-to-mid 1960s.

Either way, if you like the retro design you won't be disappointed with the finish.Particularly with the lighter Anigre wood trim, the square-ish shapes and flat switch clusters inside the Navigator generate a kind of post-modern, Scandinavian feel (furniture, not cars).The leather is thick and soft.The plastics, with some retro-looking graining, are nice to the touch.There's a mix of satin-nickel and chrome peppered throughout the cabin, and nothing looks overtly cheap, as it does in some other recent products from Lincoln's parent Ford Motor Co.The only real gripe in our test vehicle was the seam where the wood panel for the center stack blended down into the wood on the center console.It felt more like a bump.

One of the Navigator's obvious strengths is space, seemingly acres of it, in all directions.The front seats are large and thickly padded, yet they adjust to accommodate all sizes, from NBA guards to those who must sit up close to the wheel to peer over the tall dash.Power adjustable gas pedals are standard, and they can be moved forward or back with a button on the dash.These pedals have their advantages, we'd guess, but they would be more valuable if the power-adjustable steering column telescoped in addition to moving up and down (as it does in many luxury vehicles).Without a telescoping wheel, the pedals don't really add anything to the adjustment mix.If we had to choose one or the other, we'd choose the telescoping wheel.

One minor annoyance with the Navigator's driver's seat is the speed at which it automatically moves backward or forward when the key is removed or inserted.In most cases, this is a welcome feature that makes it easier to climb in and out of a tall vehicle, and the Navigator's slow-moving seat may or may not have been related to sub-zero temperatures during our test drive.Yet at times the driver's seat moved so slowly that you could literally be backed out of a parking space and going forward before it had returned to its set position.

Once the driver gets comfortable, however, it's hard to beat the commanding view ahead.A Greyhound bus or tractor-trailer rig are about the only vehicles on the road that can obstruct the driver's forward vision in a Navigator.

The gauge package is the weak link in the Navigator's interior.The dials look straight out of the 1960s, with black script on white background and white lighting.They're not as crisp as some other, more contemporary schemes.The speedometer and tachometer are fine, but the four auxiliary gauges across the top (fuel level and coolant temperature among them) aren't.They're small to begin with and essentially covered by the steering wheel rim if a driver likes to keep the wheel low in its travel range.

Switches and control buttons generally are well placed, concentrated in the center stack or on stalks on both sides of the wheel.Most are big enough to hit with gloved fingers, and they have a nice, positive operating action.The gripe here is a row of switches near the bottom of the stack controlling the fans and seat heating and cooling, among other things.The buttons are on the small side, but the illuminated pictographs on them are tiny, so they seem even smaller than they really are in the dark.

The optional navigation system works well.The video screen is smaller than many, but it's easy to figure out without studyin.

Another advantage is space.The Navigator is as big or bigger inside than any luxury-class sport-utility vehicle.The driver almost needs an intercom to converse with someone sitting waaay back in the third seat.

Well, not really.The Navigator is very quiet inside for a truck, and generally quite smooth, almost placid.If you tend to drive placidly you will probably like this vehicle.Initially, the brake pedal feels a little soft, but it's very progressive in application and easy to master for smooth, even stops, despite a curb weight exceeding 6,000 pounds for all-wheel drive models.With a little practice, the driver can avoid the fore-aft bobbing that can make motion-sensitive passengers feel car-sick in big trucks.

The Navigator is full of noise-mitigating technology, including acoustically dampened glass in the windshield and side windows.The body boom familiar in vehicles that are essentially big steel boxes, which often comes across as pulses of air hitting the eardrums, is nearly eliminated in the Navigator.The quiet seems to emphasize noise generated by the tires, which is the only noticeable encroachment on the solitude inside.The optional 20-inch wheels and low-profile tires are plain noisy, be it whacking over bumps and pavement joints or just the steady hum of tread on the road surface.Typically, we prefer the appearance of larger wheels, but the price of style is high in the Navigator.We recommend the standard 18-inch wheels and higher-sidewall tires.

The Navigator is as smooth inside as any body-on-frame truck we've tested, and generally free of annoying vibration.The ride is smooth, too (except for the effect of the 20-inch wheels), thanks partly to the fully independent rear suspension.Moreover, the rear suspension helps keep the rear tires pressed to the pavement on bumpy surfaces, eliminating most of that skipping feeling familiar in trucks with solid rear axles.There's no axle tramping over bumps or undulations, and a reasonably smooth driver can keep the Navigator's body (and those inside) nice and level through turns.

Steering is on the heavy side, perhaps surprisingly so in this type of vehicle.The good news here is that, for tracking curves or changing lanes, the steering feels responsive, direct and reasonably quick.The bad? In big, slow-speed turns, such as trying to whip into a parking space, the heavy steering feel can slow things down.Those who like the steering in smaller sedans will probably like the Navigator's.Those expecting airy, old-school Lincoln Towne Car response may not.

All Navigators come standard with Lincoln's AdvanceTrac stability control system, which monitors factors such as yaw rate and steering-wheel position to determine whether the truck is turning as its driver intends.AdvanceTrac can reduce engine power or selectively apply the brakes at individual wheels to correct a skid almost before it starts.Roll Stability Control, another component of AdvanceTrac, monitors body roll with a gyroscopic sensor and takes corrective action to reduce the chance of rolling over.Neither can defy the laws of physics, but in many cases they can prevent a moment's inattention from turning to disaster.An increasing number of studies seem to validate the value of such skid-management systems in the real world.

Bottom line, the Navigator rides comfortably and handles competently in nearly every situation.Just don't try to get racy.This vehicle amounts to a lot of mass to move, and in quick, hard, left-right turns, all that weight wants to sway in the direction opposite of your choosing.There's not a lot of ultimate gr.

NewCarTestDrive.com correspondent J.P.Vettraino filed this report from Detroit.