Saab announced that their XWD all-wheel-drive system, formerly reserved for the
V6-powered 9-3 , will now be optional on the 9-3 models equipped with the 2-litre, 4-cylinder turbo engine. Featuring with a different rear floor, the convertible version won't benefit from the system.
In normal driving conditions, the XWD delivers over 90% of the power to the front wheels in order to limit
fuel consumption . However, during abrupt acceleration manoeuvres, part of the torque is sent to the rear wheels, improving traction and weight distribution. Depending on the conditions, the system can distribute up to 100% of the power either to the front or the rear wheels.What's more, the XWD system, developed conjointly by Saab and Haldex, uses a limited slip rear differential that improves the car's stability in corners.These modifications will be introduced on the 2009 Saab 9-3.
photo: General Motors