According to General Motors, the Regal GS is officially the fastest Buick ever made. The sedan's lead development engineer, Bill Rietow, and powertrain drive quality engineer, John Townsend ...

Buick launched its mid-size Regal sedan in late 2010 as a 2011 model, with the Turbo, high-performance GS and eAssist models following suit over the past year. Now, General Motors' tri-shield arm ...