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Check out the 2012 Buick Regal with eAssist and Regal GS

The 2012 Regal with eAssist comes from pairing the direct-injected 2.4L four-cylinder Ecotec engine with a lithium ion battery system and electric motor-generator that enables regenerative braking capability. The Regal GS offers 270 horsepower and 295 pound-feet of torque while still delivering an estimated 27 mpg on the highway.

CNET Reviews staff

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The eAssist system is a $2,000 option on the Regal base model, mated to a 2.4L Ecotec engine. It's considered a "mild hybrid."
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The Buick Regal with eAssist uses a variety of advanced technologies and body enhancements to deliver an estimated 25 mpg in the city and 36 mpg on the highway.
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By the end of the year, both Regals will feature Buick's IntelliLink communications system with Bluetooth linking of handhelds and streaming audio from Pandora, Stitcher radio, and other services. The GS comes standard with a Harman Kardon premium 336-watt, 5.1 Matrix Surround Sound system and nine speakers.
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The leather-wrapped, flat-bottom sport steering wheel is topped off with a satin-finish instrument panel and ice blue ambient lighting.
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The standard four-wheel disc-brake system of the 2012 Buick Regal GS features four-piston front calipers, large ventilated front discs, and high performance linings.
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The Ecotec 2.0L direct-injected turbochared four-cylinder engine on the 2012 Buick Regal GS delivers 270 hp and 295 pound-feet of torque.

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