The all but confirmed 2012 Buck Regal GS may not get all-wheel drive like the concept shown at the 2010 Detroit Auto Show.

Bob Lutz, GM's Vice Chairman, told Inside Line that there have been numerous internal discussions about the direction of the proposed vehicle. He said that the product planners are debating whether all-wheel drive is worth the added weight and cost.

Lutz didn't confirm any details on the engine destined for the GS, but he did note that they were less than overwhelmed by the performance of the Opel's turbo V6. With that in mind, don't be surprised if the Buick GS arrives with a turbocharged four-cylinder tweaked beyond the 220-horses generated by the standard turbo four.

First Drive: 2011 Buick Regal