Top 10 Off-Road Luxury SUVs

Hummer H2 Though it has become the mascot for excessive consumption, the Hummer H2 is nonetheless one of the most capable off-road vehicles around. A rugged, full-time 4WD system with low-range gearing enables it to climb 16-inch steps and rocks; short front and rear overhangs and a generous ground clearance mean there's less of a chance the vehicle will get hung up on bumpy trails. A 325-hp 6.0-liter V8 offers ample power and a 7,000-pound tow rating. ***

Land Rover Range Rover With a well-heeled British pedigree, the V8-powered Range Rover continues to lead SUVs that venture into the wilderness. It's also one of the costliest, most luxurious SUVs offered. Land Rover's Terrain Response system allows the driver to tailor the vehicle's electronic controls and traction aids according to various road conditions, while an electronic rear differential (standard on the 400-hp Supercharged model and optional on the 305-hp base version) improves the vehicle's already tenacious trail-forging talents. ***

Mercedes-Benz GL450 Introduced for 2007, the seven-passenger GL450 is well suited for both carpooling and off-roading. Unlike most 4x4s, it's built on a reinforced unibody structure that affords more of a car-like feel on pavement than the truck-based competition. Be aware, however, that you'll need to specify the $2,200 Off-Road Package to maximize ground clearance and off-road prowess. A 4.6-liter V8 engine is rated at a hearty 335 hp and comes mated to a seven-speed automatic transmission. ***

Land Rover LR3 You could certainly pay less for a midsize SUV, but few combine the inherent luxury and off-road readiness of the LR3. Known as the Discovery in other markets, this upper-crust Brit offers a choice of V6 and V8 engines, with five- or seven-passenger seating. A center-locking differential, a long list of chassis control functions and the automaker's adjustable Terrain Response system combine to deliver secure handling and a smooth ride in a wide range of conditions. ***

Land Rover Range Rover Sport This big SUV is sporty by SUV standards, thanks largely to well-balanced handling and strong engines (300-hp V8 or 390-hp supercharged V8). However, the Range Rover Sport can be just as entertaining on the trails. It shares the LR3 and Range Rover's low-range 4x4 gearing, lockable center differential and the Terrain Response system that maximizes performance according to five settings that correspond to different road conditions; three of which are off-road (mud, sand and rocky surfaces). ***

Lexus LX 470 Lexus' upscale version of the venerable Toyota Land Cruiser excels as a posh off-road adventurer, thanks to a hardy, full-time 4WD system that features a locking center differential and four-wheel traction control. A height-adjustable adaptive suspension provides added ground clearance for off-road use. While the 2007 model's 4.7-liter V8 is rather meek at 268 hp, the vehicle will receive a more-powerful 381-hp 5.7-liter V8 engine with its 2008 redesign, which will prompt a name change to the LX 570. ***

Mercedes-Benz G500 Derived from a German military vehicle designed in the 1970s, the G500 soldiers on as an unabashedly boxy, low-volume, high-priced and somewhat eccentric luxury SUV. While it offers a comfortable cabin, the G500 remains rugged and is one of the few SUVs of any kind to offer three separate locking differentials for exceptional off-road aptitude. Its 292-hp V8 engine has to work hard to move the un-aerodynamic bulk with authority; the G55 AMG version includes a much-quicker 469-hp supercharged V8, but at a steep price. ***

Porsche Cayenne After taking the 2007 model year off, the Porsche Cayenne is updated and reintroduced as an early-2008 entry. As before, it's offered in 290-hp base, 385-hp S and 500-hp Turbo S models, the latter of which boasts the best off-road specs, but is priced just short of $100,000. The Cayenne's sophisticated 4WD system can send up to 100 percent of the vehicle's traction to the front or rear axle if needed. The available Porsche Dynamic Chassis Control (PDCC) system limits vehicle roll on pavement through corners and enables maximum axle articulation and improved traction off-road ***

Lexus GX 470 Introduced as a smaller and lower-cost alternative to the LX 470, the GX 470 is essentially a luxury version of the Toyota 4Runner with a V8 engine. A full-time 4WD system is standard, the vehicle's ActiveTRAC technology is able to apply the brakes to a slipping wheel while transferring the engine's power to wheels with better traction. An optional Kinetic Dynamic Suspension System hydraulically controls a set of oversized front and rear stabilizer bars to further enhance its trail response. ***

Volkswagen Touareg The Touareg hasn't been a big seller, despite being both luxurious and capable. It shares some components with the Porsche Cayenne. A standard 4Motion permanent AWD system enables the Touareg to scale a 45-degree grade; a sophisticated suspension gives relatively responsive on-road handling. Three engine choices include a 310-hp 5.0-liter V10 turbodiesel that generates 553 pound-feet of torque for extreme pulling and climbing power. A freshening later this year will rechristen it the Touareg 2. ***