Saab remembers its past performance

Saab remembers its past performance

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Photos by -Autonet.ca
Staff
Published: 09 04 2008

General Motors of Canada has priced the new, limited edition 2008 Saab Turbo X 9-3 at under $55,000.

GM Canada is hoping the all-black Turbo X evokes memories of the first black 99 and 900 Turbos, while introducing Saab’s cutting-edge “cross wheel drive” (XWD) technology. Sedans start at $54,995 while the SportCombi wagon goes from $56,305. The XWD system is also available as a $2,340 add-on to 2008 Saab 9-3 Aero sedans and wagons.

Beyond 9-3, the Saab Turbo X has enhanced aerodynamic performance and a distinctive appearance with grey/titanium-finished 18-inch alloy wheels. The car sits 10 mm lower than regular 9-3s, with springs and dampers optimized to minimize body movement. Self-levelling rear dampers maintain a consistent ride height. Stopping is entrusted to ventilated 345 mm (13.6-inch) discs at the front; and ventilated, 292 mm (11.5-inch) rotors at the rear. Grip is provided by 235/45R18 tires.

Developed in partnership with Haldex of Stockholm, the Saab XWD system is designed to optimize vehicle handling and stability in all driving conditions. It is offered in combination with an uprated 280-hp 2.8-litre turbo V6 that delivers 295 lb.-ft. of torque in order to exploit the improved traction. It can be mated to either a six-speed manual or X-speed automatic.

The state-of-the-art all-wheel-drive system includes two innovative features: pre-emptive engagement of the rear wheels to optimize launch and an active rear limited-slip differential (eLSD) to transfer torque between the rear wheels. It can send 100 percent of torque to the front or the rear wheels.

At take-off, a torque transfer device (TTD) is initially activated engaging the rear drive module, whereas most current AWD technology has to detect wheel slip before transferring torque away from the wheel that’s slipping. All the driver reportedly feels is smooth, strong acceleration from rest without any initial hesitation.

On the open road, drive torque is seamlessly and continuously varied between the axles. When cornering, Saab XWD applies rear drive in order to balance oversteer and understeer characteristics, thus improving stability and road holding. During highway cruising, only 5- to 10-percent of engine torque is transmitted to the rear (providing a greater measure of stability while helping to save fuel).

The eLSD diverts up to 40 percent of torque to whichever wheel has more grip. During high-speed manoeuvres, such as hard cornering or an emergency lane change, it diverts more or less torque to either of the wheels to help the rear of the car track more closely with the front wheels. This yaw damping effect can keep the car better balanced without requiring electronic stability aides.

This represents the first application of an electronically controlled, rear limited-slip differential in the segment.

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