Under the hood of the 2006 Saab 9-3 Sportwagon is a new turbocharged, 2.8-liter V6 motor. Good for about 250 horsepower, the 24-valve engine will only be available on Aero models. Other models will likely get one of the 2.0-liter, turbocharged four-cylinder motors currently offered in the 9-3 sedan and convertible.