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The X7’s pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The Tahoe doesn’t offer pre-crash pretensioners.
The X7 has standard Post-Crash Braking, which automatically apply the brakes in the event of a crash to help prevent secondary collisions and prevent further injuries. The Tahoe doesn’t offer a post collision braking system: in the event of a collision that triggers the airbags, more collisions are possible without the protection of airbags that may have already deployed.
To provide maximum traction and stability on all roads, All-Wheel Drive is standard on the X7. But it costs extra on the Tahoe.
The X7 offers an optional Surround View to allow the driver to see objects all around the vehicle on a screen. The Tahoe only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.
The X7’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Tahoe doesn’t offer a driver alert monitor.
For better protection of the passenger compartment, the X7 uses safety cell construction with a three-dimensional high-strength frame that surrounds the passenger compartment. It provides extra impact protection and a sturdy mounting location for door hardware and side impact beams. The Tahoe uses a body-on-frame design, which has no frame members above the floor of the vehicle.
Both the X7 and the Tahoe have standard driver and passenger frontal airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights and rearview cameras.
The X7 comes with a full 4-year/50,000-mile basic warranty, which covers the entire truck and includes 24-hour roadside assistance. The Tahoe’s 3-year/36,000-mile basic warranty expires 1 year and 14,000 miles sooner.
The X7’s corrosion warranty is 6 years and unlimited miles longer than the Tahoe’s (12/unlimited vs. 6/100,000).
BMW pays for scheduled maintenance on the X7 for 1 year and 12000 miles longer than Chevrolet pays for maintenance for the Tahoe (3/36,000 vs. 2/24,000).
For smoother operation, better efficiency and fewer moving parts, the engines in the X7 have an overhead cam design, rather than the old pushrod design of the engines in the Tahoe.
From surveys of all its subscribers, Consumer Reports’ December 2018 Auto Issue reports that BMW vehicles are more reliable than Chevrolet vehicles. Consumer Reports ranks BMW 15 places higher in reliability than Chevrolet.
The X7 xDrive50i’s standard 4.4 turbo V8 produces 36 more horsepower (456 vs. 420) and 19 lbs.-ft. more torque (479 vs. 460) than the Tahoe’s optional 6.2 V8.
On the EPA test cycle the X7 xDrive40i gets better fuel mileage than the Tahoe 4x4 with its standard engine (20 city/25 hwy vs. 15 city/21 hwy).
Regenerative brakes improve the X7’s fuel efficiency by converting inertia back into energy instead of wasting it. The Tahoe doesn’t offer a regenerative braking system.
In heavy traffic or at stoplights the X7’s engine automatically turns off when the vehicle is stopped, saving fuel and reducing pollution. The engine is automatically restarted when the driver gets ready to move again. (Start/Stop isn’t accounted in present EPA fuel mileage tests.) The Tahoe doesn’t offer an automatic engine start/stop system.
The X7’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The Tahoe doesn’t offer launch control.
For better traction, the X7 has larger standard tires than the Tahoe (F:275/40R22 & R:315/35R22 vs. 265/65R18).
The X7’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the Tahoe LS/LT’s standard 65 series tires. The X7’s optional 275/40R22 front and 315/35R22 rear tires have a lower 40 series front and 35 series rear profile than the Tahoe’s optional 45 series tires.
For better ride, handling and brake cooling the X7 has standard 21-inch wheels. Smaller 18-inch wheels are standard on the Tahoe LS/LT.
Changing a flat tire near traffic can be dangerous and inconvenient. The run-flat tires standard on the X7 can be driven up to 50 miles without any air pressure, allowing you to drive to a service station for a repair. The Tahoe doesn’t offer run-flat tires.
For superior ride and handling, the BMW X7 has fully independent front and rear suspensions. An independent suspension allows the wheels to follow the road at the best angle for gripping the pavement, without compromising ride comfort. The Chevrolet Tahoe has a solid rear axle, with a non-independent rear suspension.
The X7 has standard front and rear stabilizer bars, which help keep the X7 flat and controlled during cornering. The Tahoe’s suspension doesn’t offer a rear stabilizer bar.
The front and rear suspension of the X7 uses air springs for a smoother, controlled ride than the Tahoe, which uses coil springs. Air springs maintain proper ride height and ride more smoothly.
For a smoother ride and more stable handling, the X7’s wheelbase is 6.2 inches longer than on the Tahoe (122.2 inches vs. 116 inches).
For greater off-road capability the X7 has a greater minimum ground clearance than the Tahoe (8.7 vs. 7.9 inches), allowing the X7 to travel over rougher terrain without being stopped or damaged.
Unibody construction lowers the X7’s center of gravity significantly without reducing ground clearance. This contributes to better on the road handling and better off-road performance and stability. In addition, unibody construction makes the chassis stiffer, improving handling and reducing squeaks and rattles. The Tahoe uses body-on-frame design instead.
The X7’s standard towing capacity is much higher than the Tahoe’s (7500 vs. 6400 pounds).
J.D. Power and Associates surveys of service recipients show that BMW service is better than Chevrolet. J.D. Power ranks BMW 8th in service department satisfaction (above the industry average). With a 8% lower rating, Chevrolet is ranked 10th.
Unlike the driver-only memory system in the Tahoe LT/Premier, the X7 offers an optional passenger memory, so that when drivers switch, the memory setting adjusts the driver’s seat, steering wheel position, outside mirror angle, climate settings and radio stations and the front passenger seat also adjusts to the new passenger’s preset preferences.
The X7’s front and rear power windows all open or close fully with one touch of the switches, making it more convenient at drive-up windows and toll booths, or when talking with someone outside the car. The Tahoe’s rear power window switches have to be held the entire time to open or close them fully.
To help drivers see further while navigating curves, the X7 has standard adaptive headlights to illuminate around corners automatically by reading vehicle speed and steering wheel angle. The Tahoe doesn’t offer cornering lights.
The X7’s optional Parking Assistant can parallel park or back into a parking spot by itself, with the driver only controlling speed with the brake pedal. The Tahoe doesn’t offer an automated parking system.
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