With stiffer fuel economy regulations looming, Ford introduces a Mustang Boss 302 with a four-cylinder EcoBoost engine. GM counters by bolting a Volt powertrain into the 2013 Corvette, and Toyota expands its Prius lineup to include SUVs, CUVs, and pickups. Land Rover dealers experience a rush of orders before sales of the two-ton Range Rover, which gets 13 miles to a gallon, are permanently banned.

By Alex Taylor III, senior editor-at-large @FortuneMagazine - Last updated December 29 2011: 5:20 AM ET
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The most disliked cars of 2011

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