The Saab 9-3 Aero XWD is the newest Saab with innovative cross-wheel - drive-wheel-drive technology. Based on a system with hydraulic Haldex multi-plate clutch, already passed the Saab 9-3 Aero XWD during start-up to 65 percent of torque to the rear. This itself is entertaining from slip on the front wheels. The special feature on Saab - wheel-drive system is its electronically controlled limited slip differential ELSD : This allows, in contrast to front-drive Saab 9-3 as needed more power is sent to the outside wheel than on the inside of the curve. During fast cornering or changing direction, this provides additional stability. Unlike the Saab 9-3 Turbo X, a special model with V6 turbo engine and 280 hp, which is on the market since mid-2008, the Saab 9-3 2.0 T Aero XWD content with a four-cylinder engine with 210 turbo hp. However, this also available as a sedan four-wheel wagon, which is available both with manual six-speed gearbox and a six-speed automatic has, in terms of performance not hide behind the targeted competitors from Ingolstadt and Munich. And since the 2008 Saab 9-3 Aero is already fully equipped with all-wheel drive as any Saab, it may well become an insider tip in the premium middle class entirely.