Paradigm Shift? Four Cylinder Engines Become America's Top Choice In 2011

Four cylinders have replaced sixes as America's most popular engine choice, powering 43 percent of U.S. light vehicles sold in the first half of this year, according to IHS Automotive.

In 2005, V-6s were in an identical 43 percent of vehicles sold. But over six years, four-cylinder engines rose while six-bangers fell, with fours overtaking sixes in 2009. That American icon, the V-8, has lost favor even faster. It now is under one of every six hoods vs. almost one of three in 2005.