GM to Unveil Volt This Month

After giving us coy pictures of front corners and rear decks of the design concept, GM says they will unveil the Chevy Volt in all its production-trim glory at the company’s 100th birthday party September 16. Preproduction models will be built in 2009, with sales of the real deal expected to begin in 2010.

GM chair Bob Lutz told Automotive News Europe that the production Volt will be the “next generation global compact architecture.” For those who don’t speak Auto Industry as a first language, that means the U.S. version of the Volt will use many of the same underpinnings as GM’s upcoming world-market offerings. For examples of this design, keep an eye out for the Opel Astra and Chevy Cruze at the Paris auto show this year.

Meanwhile, according to Motor Trend, GM and the EPA are debating whether the Volt is a hybrid or an electric vehicle. The outcome will decide how fuel-economy numbers will be calculated. The car has an electric motor with a combustion engine that acts as a range extender when the batteries run out.

GM wants the car to pass the EPA’s tests using the electric motor 85% of the time, which would give it a rating of 100 mpg or more. The EPA wants the Volt to pass the tests with its batteries near full charge at the end, which would require the gasoline-powered engine to run most of the time. This calculation would drop the fuel economy to about 48 mpg. When fuel economy is your sales tool, a Prius-like 48 mpg might hurt sales of the $40,000-plus Volt.