Buick has officially unveiled the Regal Hybrid, ahead of its debut at the Chicago Auto Show.

Aimed at eco-conscious buyers, the Regal features the eAssist system which pairs a 2.4-liter four-cylinder engine with a small electric motor that is powered by a 115-volt lithium-ion battery. More specifically, the engine produces 182 hp (136 kW / 185 PS) and 172 lb-ft (233 Nm) of torque, while the electric motor delivers an additional 15 hp (11 kW / 15 PS) and 79 lb-ft (107 Nm) of torque.  Thanks to an aggressive fuel cut-off (during deceleration) and an engine start / stop system, GM estimates the car will achieve an EPA rating of 26 mpg city / 37 mpg highway - a 25% improvement over the standard four-cylinder Regal.

On the styling front, changes are minimal but include improved "underbody aerodynamics" and lightweight 17-inch alloy wheels with low rolling resistance tires. Inside, there's a revised instrument cluster, an eco-minded air conditioner, and an infotainment system with a seven-inch display.

No word on pricing, but the Regal Hybrid will start arriving at dealerships this fall.

Check out the press release for additional information

Gallery: 2012 Buick Regal Hybrid revealed

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