Monday, October 31, 2011

BMW X5 4.8i (2007)

BMW X5 4.8i (2007)

Before the original BMW X5 came along, big four-wheel drives tended to know their place. Yes, there were cranky one-offs like the Lamborghini LM002 and various Over finch-tuned Range Rovers that plumbed powerful engines into big sports utility vehicles, but all too often this surfeit of horsepower only served to highlight the shortcomings of a chassis derived from basic agricultural equipment. The X5 changed all that. Some initially sniffy comments that it was little more than a 5 Series Touring on stilts were meant as a barb but merely highlighted quite how good the X5 was to drive. So much so that 90 per cent of all X5s sold were specified in more focused Sport trim.



Flexible interior, Characteristic seating position

The new BMW X5 is 7.4 inches longer than its predecessor. However, the body designers have maintained the typical proportions of BMW's outstanding SAV, as well as the overall sporting character of the vehicle. The extra size only becomes apparent at first glance within the interior of the new BMW X5.

Significant ground clearance and the high, command seating position continue to characterize the unique driving experience. At the same time the interior is even more flexible than before and, for the first time, allows the integration of an optional, third row of seats. Just as with the original, the interior of the new X5 is characterized by premium flair and a wide range of features which set new standards for vehicles in this segment.

Dynamic driving of a typical BMW SAV.


The new BMW X5 further enhances its leadership in driving dynamics. While the previous model was successful in setting and remaining the benchmark in this respect throughout its entire product cycle, BMW's drivetrain and chassis development specialists have now set the standard even higher in terms of power and performance, agility, dynamics, and ride comfort. They have achieved this while retaining the basic principles of unit-body design, independent suspension, and full-time, electronically controlled variable all-wheel drive.

Both engines for the BMW X5 have been substantially upgraded in power, performance and refinement. The chassis and suspension - which enable this new-found power and performance to be used to best effect on road, track or no road at all - is brand-new from the ground up.
Exclusive and Innovative suspension technology.

The new BMW X5 boasts a double wishbone front suspension, which is noteworthy for this type of vehicle. This optimizes tire contact on the road and makes the new X5 capable of reaching impressively high cornering forces.

The integral IV rear suspension, patented by BMW, also helps to give the new BMW X5 truly outstanding potential on the road. Through its configuration, the rear suspension is better able to separate the driving and shock-absorbing functions.  The wheel mounts and suspension subframe, as well as no less than four control arms, takes up drive and dynamic forces fed into the suspension. Lastly, soft front swing mounts on the rear suspension subframe, optimize the longitudinal suspension of the wheel guidance elements and enhance ride comfort substantially.

The new rack-and-pinion steering with a variable transmission ratio geared to the steering angle meets the requirements of different driving situations at all times. The steering helps keep the driver safely in control of his vehicle even at higher speeds, offering outstanding directional stability. In bends, on the other hand, the driver will feel more direct steering response with the steering ratio geared to the steering angle which provides a dynamic style of driving.



Active Steering and AdaptiveDrive are just Unique in the segment

The new BMW X5 is the first vehicle in its class to offer Active Steering as an option. This advanced system developed by BMW offers the right steering ratio at all speeds. Up to a speed of approximately 55 mph (90 km/h), steering behavior is more direct, meeting the requirements of sporting and active driving. Another advantage is that the driver only has to turn the steering wheel twice from lock to lock. At higher speeds, on the other hand, the Active Steering transmission is more indirect, enhancing the directional stability of the vehicle and, accordingly, driving comfort.

Active Steering, when ordered, is combined in the new BMW X5 with Servotronic for optimal power steering boost at all speeds. Active Steering can also help to stabilize the X5 should the driver experience the onset of oversteering or understeering in a bend or in particularly demanding brake maneuvers. When applying the brakes on surfaces with varying frictional coefficients (split-friction braking), for example, Active Steering precisely but discreetly countersteers to help the X5 stop in a sure straight line.

Carefully coordinated interaction of the anti-roll bars and shock absorbers by way of AdaptiveDrive, part of the Sport Package in the U.S., is equally unique in this SAV's segment. The combination of Active Roll Stabilization and Electronic Damping Control gives the new BMW X5 a standard of handling capability and ride quality never seen before in a vehicle of this kind. Using sensors, AdaptiveDrive constantly monitors and calculates data on the road speed of the vehicle, its steering angle, straight-line and lateral acceleration, body and wheel acceleration, as well as height levels. Then, based on this information, the system controls both the swivel motors on the anti-roll bars and the electromagnetic shock-absorber valves, controlling body roll and damping as required at all times.

Simply by pressing a button, the driver can choose either a sporting or a more comfortable basic setting of AdaptiveDrive.

Data transfer via Flex Ray is a World debut

The FlexRay high-speed data transmission system is used for the first time in the industry for fast and reliable coordination of all AdaptiveDrive functions. FlexRay has been enhanced to production standard by a consortium of development companies under the leadership of BMW. This system offers a level of data transfer capacity never seen before. The new BMW X5 is the first vehicle in the world to feature FlexRay technology.


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