Cutting edge “cross-wheel-drive” system offers class-leading performance and control


Saab introduces a new, innovative all-wheel-drive system (Saab XWD - 'cross wheel drive') available on the 9-3 Sport Sedan and SportCombi Aero models. The Saab XWD system is designed to optimize handling and stability in all driving conditions and will be available beginning in early 2008. Additionally, the full Saab 9-3 model range features bold new design and styling inspired by Saab’s award-winning Aero X concept car.

Combined with an uprated 280 hp (206 kW), 2.8 V6 turbo engine which delivers almost 15% more torque (400 Nm), the Saab XWD system is available with a choice of six-speed manual or automatic transmissions.

Saab XWD

Saab’s XWD is a fully automatic, on-demand all-wheel-drive system capable of sending up to 100% of engine torque to the front or rear wheels and variable torque transfer between the rear wheels while featuring innovative developments in wheel slip management and, as an option, the use of an electronically-controlled rear limited-slip differential. The Saab XWD system improves on current technology by providing maximum traction immediately at take-off, for smooth, strong acceleration, eliminating the initial hesitation experienced in typical AWD systems.

On the open road, drive torque is seamlessly and continuously varied between the axles. When cornering, Saab XWD provides enhanced and more finely balanced chassis dynamics. The system is capable of applying rear drive, as needed, to balance oversteer and understeer characteristics, improving stability and road-holding. In highway cruising conditions, when traction or optimum grip is not an issue, only 5% to 10% of engine torque is typically transmitted to the rear wheels. This helps provide greater stability and fuel efficiency.

Saab XWD also features a segment-first application of an electronically-controlled, rear limited slip differential (eLSD). In icy or wet split-friction conditions it can transfer up to 40% of torque between the drive shafts, to whichever wheel has more grip. The eLSD also gives the driver enhanced control in cornering or lane change maneuvers by momentarily applying more or less torque to either of the rear wheels to help the rear of the car more closely follow the direction of the front wheels. This yaw damping effect keeps the car better balanced and more tightly controlled.

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