DETROIT--General Motors Co. said its new Chevrolet Volt electric car is expected to get 230 miles per gallon in city driving as the auto maker outlined a raft of product introductions.

The Volt is at the forefront of GM's efforts to reinvigorate a line-up that has lost market share in the U.S., with 25 new vehicles due to be launched by 2011. At that rating, the Volt would dwarf any offering from a mass-market brand, including Toyota Motor Corp.'s Prius.  more coming soon! ...