The upgraded 4.4-L V8 features a new 6-speed Steptronic automatic gearbox, which should improve the modified engine's acceleration when compared to the 2003 X5 4.4i's current 7.9 seconds to 100 km/h. Probably more responsible for the added pickup will be the new Valvetronic engine's added output, raised 25-hp from 290 to 315. What's the result of all this added power? The sprint from 0 to 100 km/h will only take 7.0 seconds, knocking almost a second from the old number.
 |
| Say goodbye to the wonderful 4.6is, and say hello to the new 4.8is with improved acceleration and overall balance. (Photo: BMW AG) |
What about a new 4.6is model? After testing the top-tier X5 last year I fell head over heals, it's a wonderful combination of power and agility that will get a solid boost up the desirability ladder with the advent of the updated X5. Starting in the spring of 2004 the 4.6is designation will be gone, replaced with a 4.8is badge. No doubt 200 cc will go a long way to improve acceleration, while its xDrive four-wheel drive system will enhance overall balance.
 |
| BMW claims xDrive reacts ultra quick, 'thinking' further in advance than competitive systems and then taking only a few milliseconds after friction is lost to find traction again. (Photo: BMW AG) |
What's xDrive? BMW's intelligent all-wheel-drive system reportedly sets new agility standards for all-wheel-drive vehicles on the whole. Designed to maximize grip, reducing both under and oversteer, the system immediately responds to road surface changes to optimize traction. Infinitely adjustable, xDrive varies the distribution of torque between front and rear to improve overall balance and composure. What's more, BMW claims it reacts at an alarming rate of speed, 'thinking' further in advance than competitive systems and then taking only a few milliseconds after friction is lost the wheels to find traction once again. Maximizing grip obviously adds to the new X5's safety, further enhanced by BMW's DSC stability management system.