2012 Subaru Impreza (© Subaru of America)Click to enlarge picture

Subaru says the 2012 Impreza will be the most fuel-efficient all-wheel-drive car sold in the U.S. market.

Subaru is launching a roomier and more modern looking Impreza compact — the brand's smallest car sold in the U.S. market.

The redesigned 2012 sedan and five-door hatchback Impreza will be unveiled at the New York Auto Show later this month.

Bing: 2012 Subaru Impreza

The Japanese-built vehicle goes on sale this fall. Pricing hasn't been disclosed.

Subaru didn't release many details today but said the Impreza will have an estimated highway fuel economy rating of 36 mpg.

It will be the most fuel-efficient all-wheel drive car sold in the U.S. market, Subaru says.

The 2012 Impreza is expected to use Subaru's new four-cylinder boxer engine and a new continuously variable transmission.

Subaru showed the concept Impreza at last year's Los Angeles Auto Show with a 2.0-liter four-cylinder version of the engine. A 2.5-liter engine powers the 2011 Forester.

Subaru — without providing dimensions — said the car will have more interior room and "improved levels of comfort and refinement."

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The current Impreza has been criticized for its lack of rear-passenger room.

Subaru has been improving the interior room of its vehicles as they are renewed, giving vehicles like the larger Legacy more competitive rear leg-room space.

The Impreza competes with segment heavyweights such as the Honda Civic, Toyota Corolla, Hyundai Elantra, Ford Focus and the Chevrolet Cruze. Unlike the competition, all-wheel drive is standard on the Impreza — and all Subaru vehicles.

The 2011 model-year four-door Impreza starts at $18,220 including destination and the five-door at $18,720.