In the personal luxury category, there are no two heavier heavyweights than the four-seater Thunderbird and the Buick Riviera, so it would stand to reason that a comparison between the two is inevitable. Josiah Work took on that task for SIA #94, August 1986, choosing to pit the 1963 versions of each against each other. Whether you agree or disagree with the results, one thing is certain: They’re both fine pieces of American iron, and most enthusiasts would have a hard time deciding between them.