The 83rd Geneva Motor Show officially opens to the public this week on March 7, but that hasn't stopped companies from revealing their new cars ahead of schedule.

Since a lot is riding on this year's show, including the current state of the European auto industry, companies have started releasing sneak peak pictures on their company websites to get people excited. One of those companies is Fiat's new Alfa Romeo 4C.

The new Fiat, built in Maserati's Modena, Italy plant, will come with a new turbocharged four-cylinder engine according to a company press release. The company plans use this vehicle to re-launch the Alfa Romeo brand in the U.S. by the end of 2013.

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Volkswagen has also released photos of their new vehicle which they're calling the XL1 plug-in hybrid. The company has advertised the vehicle as the "most fuel-efficient production vehicle in the world" and is expected to get 261 miles per gallon according to the company's website.

The two-seat hybrid has an all-electric driving range of approximately 31 miles. The vehicle is powered by a combination of a two-cylinder diesel engine and electric motors according to VW and weighs only 1,752 pounds.

The Audi S3 Sportback will also make its world-wide debut at the Motor Show according to a company press release. The company's newest hatchback compact is powered by a 300 horsepower 4-cylinder engine and can go 0 to 60 in approximately five seconds.

Audi has yet to reveal if the vehicle will be sold in the U.S. like their A3 model.

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