Speed has always been part of Cadillac’s DNA, even long before the modern performance era. There’s something special about a luxury vehicle that doesn’t just look refined but moves with authority. Around Boucher Cadillac of Waukesha, customers often ask which Cadillac sits at the top of the performance ladder. And honestly, it’s a fun question—because Cadillac doesn’t just build fast vehicles; it builds machines engineered to deliver speed with purpose, precision, and unmistakable style. So, what is the fastest Cadillac today? Let’s break it all down.