Saab closed its plant in April 2011, and the company and its assets were later bought by China-connected National Electric Vehicle Sweden.
The two cars are being used to fine-tune assembly. The production cars will be powered by gasoline direct injection (GDI) engines with turbochargers.
Saab people say the new car will be little different visually from the old one, which was built on an Opel-based platform.
An electric version is planned for next year.
