After the excitement of Auto Shanghai, US brands have been refocusing their attention on the US market, launching new models as the New York International Auto Show gets underway ahead of its public opening this weekend.

Ford, fairly quiet at the Auto Shanghai show earlier this week, unveiled the 2013 Taurus, tweaking the engine efficiency and adding new technology to one of its flagship models.

The new version includes a 2.0-liter EcoBoost engine which can deliver 31 mpg (7.59 l/100km) and 237 horsepower, although it will still be available with a 3.5-liter V6 engine which has been optimized to offer 27 more horsepower.

Inside, Ford has added its SYNC infotainment system and MyFord Touch cellphone connectivity, along with a new heating steering wheel, massage seats, a rear-view camera and rear-view power sunshade.

Ford's competitor General Motors, fresh from unveiling the new Chevrolet Malibu in Shanghai, announced an ECO version of its sedan in honor of Earth Day on April 22.

The Malibu ECO, the most fuel-efficient sedan in Chevrolet's 100-year history, uses "light electrification" mated to the 2.4-liter Ecotec engine to provide an electronic driving boost in certain scenarios, enabling the Malibu ECO to manage an impressive 38 mpg (6.18 l/100km).

It will be available early next year, although pricing is still unconfirmed.

Chevrolet's sister brand Cadillac also unveiled a revamp of its CTS Sports sedan with more power and a new front grill, while Chrysler unveiled several new model options for its Chrysler 300 sedan.

The new Chrysler 300S and 300C are designed to broaden the appeal of the 300, by adding new interior technology for the youth market to the 300S model and premium touches for the executive market with the 300C model.

The New York International Auto Show runs April 22 - May 1 in New York.

Search for used cars