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The crossover SUV market has grown by leaps and bounds over the past couple of years. Along the way, a few vehicles have tipped the scales more toward car than SUV. The Infiniti EX35 comes to mind. Now, BMW is pushing the crossover idea further than ever by introducing the world's first crossover coupe. BMW calls it a Sports Activity Coupe.

The 2008 BMW X6 is a high-riding, four-passenger, four-door coupe, a combination of sports car and SUV. The X6 is offered in two twin-turbocharged models, with inline-6 or V8 power. Both engines provide ample power for everyday use and even for towing. The V8 makes the X6 a hot rod, but we recommend the inline-6, because it has plenty of pep and is more fuel efficient. Shifter paddles on the steering wheel add to the sporty character of the X6.

We found the BMW X6 handles well on the road and on the track. It's better than any SUV but not as good as BMW's own sporty coupes and sport roadsters. It corners with little body lean, but the stiff suspension makes the ride somewhat harsh, especially with the Sport Package and optional 20-inch wheels. We recommend buyers test these options before they buy.

Inside, the X6's ambience is upscale, with lots of leather and soft-touch surfaces. BMW's iDrive control system is standard. It can complicate some interior controls, but programmable buttons are provided to ease control of some of your favorite functions.

Front-seat passengers have plenty of room, though visibility to the rear is restricted by a small, flat rear window. Two rear-seat occupants should be comfortable, too, provided they're not tall.

The rear hatch lifts up and the rear seat folds down to give the BMW X6 a nice amount of cargo storage space. It's on par with most hatchbacks, but isn't as good as other SUV. Also, the liftover is higher, so you'll have to lift cargo higher when loading.

It's hard to pigeonhole the X6. It rides high, so it doesn't handle as well as a sport coupe, and it doesn't have the cargo and people carrying capacity of an SUV. But overall it's a fine vehicle. Pricing is high, especially for the V8 model, so we'd recommend the six-cylinder model for anyone considering this vehicle.

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The 2008 BMW X6 is offered in two models, both with BMW's xDrive all-wheel-drive. The X6 xDrive35i uses BMW's twin-turbocharged 3.0-liter inline-6 that makes 300 horsepower. It is mated to a six-speed automatic transmission that can be controlled manually via the shifter or a pair of steering wheel paddles. xDrive is meant for street use and lacks low-range gearing.

The BMW X6 xDrive35i ($52,500) comes standard with leather seat-upholstery, dual-zone automatic climate control, power tilt/telescoping leather-wrapped steering wheel with audio controls, cruise control with brake function to maintain the set speed down hills, 10-way power-adjustable front seats, interior air filter, 60/40 split folding rear seat, power mirrors with tilt-down back-up aid, power windows, power door locks, remote keyless entry, power sunroof, 10-speaker AM/FM/CD/MP3 stereo, auxiliary input jack, outside-temperature indicator, rain-sensing variable-intermittent wipers with heated washer nozzles, rear cargo shade, bi-xenon adaptive automatic headlights, theft-deterrent system, front cornering lights, fog lights, and P255/50 R19 run-flat tires on alloy wheels.

The BMW X6 xDrive50i ($63,000) has a twin-turbocharged 4.4-liter V8 engine that produces 400 horsepower. It uses the same six-speed automatic and comes with xDrive. Standard features include 20-way power multi-contour front seats, a navigation system with voice activation and real-time traffic, and a load-leveling suspension.

Several option packages are available. A ventilated seat package ($1,100) for the xdrive50i adds front ventilated seats and an active driver's seat that subtly changes the contours of its left and right halves periodically to reduce body fatigue. The same package for the xDrive35i ($2,100) also has 20-way adjustable multi-contour seats. A Cold Weather package ($900) has a heated steering wheel, heated front seats, retractable headlight washers, and a ski bag for the rear seat passthrough. A Premium package ($1,750) adds a universal garage door opener, auto-dimming rearview mirror, power folding and auto-dimming exterior mirrors, four-way power adjustable lumbar support for the front seats, a digital compass for the rearview mirror, ambient lighting, a rear storage system, a Bluetooth cell phone link, and BMW Assist emergency and concierge service. The Premium Sound package ($2,000) has a 600-watt audio system with 16 speakers and two subwoofers, digital equalizing for each seating position, a 6-disc CD/DVD changer, and an iPod and USB adapter. The Rear Climate package ($900) includes rear side window shades, four-zone automatic climate control, and privacy glass. A Technology package for the xDrive35i ($2,000) adds a rearview camera and the navigation system.

A Sport package is offered for each model. Three versions are offered for the xDrive35i. The basic package ($3,600) comes with P255/50 R19 run-flat tires on light alloy wheels, BMW's Adaptive Drive with Active Roll Stabilization and Electronic Damping Control with Sport and Comfort settings, 10-way power adjustable front sport seats, Shadowline exterior side window trim, an anthracite headliner, and a higher top speed limiter; P275/40 R20 front and P315/35 R20 rear tires on run-flat performance tires ($950) can be added and BMW's 20-way adjustable multi-contour seats are available ($1,200). The xDrive50i has sport, multi-contour seats standard, but otherwise the Sport package ($3,100) items are the same.

Additional options: rear DVD entertainment ($1,700), BMW's Active Steering ($1,400), a power rear liftgate ($500), BMW's Comfort Access keyless entry and starting ($1,000), soft-close automatic doors ($600), running boards ($300), a rearview camera ($400), heated front seats ($500), multi-contour front seats ($1,200), heated rear seats ($350), a navigation system ($1,900), a head-up display ($1,200), BMW Assist ($750), HD radio ($350), Sirius satellite radio ($595), and upgraded perforated Nappa leather ($1,000).

Safety features include dual front airbags; front side-impact airbags; curtain side airbags with rollover deployment; tire-pressure monitor; front and rear park assist; traction control; electronic stability control with cornering brake control and Trailer Sway Control; Hill Descent Control; Hill Start Assist; and ABS with electronic brakeforce distribution, brake assist, brake drying and brake fade compensation. The only safety option is the rearview camera.