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1987 Buick Regal Grand National â?" Numbers-Matching WE2 Package, Freshly Rebuilt LC2 Turbo V6 Why This Car Is Special The 1987 Buick Regal Grand National holds a specific and well-documented place in American automotive history. It was the last year of production for the Grand National, and it arrived at exactly the right moment. By 1987, Buick's engineers had refined the turbocharged 3.8-liter V6 to a point where it could embarrass purpose-built sports cars from Ferrari and Porsche in straight-line acceleration â?" a fact that was widely reported at the time and has never been forgotten by people who follow performance cars seriously. What made the Grand National concept unusual from the start was its origin.