The story goes, GM made the fantastic decision that the executives in charge of each division had to drive their own cars. So Chevy, Buick, Pontiac, and Oldsmob

The story goes, GM made the fantastic decision that the executives in charge of each division had to drive their own cars. So Chevy, Buick, Pontiac, and Oldsmobile wound up making something very much like a Cadillac. This created brand confusion, and Cadillac lost its status. (although i can't remember the source of this story, so it might just be a fairy tale from the 80's) Also, i thought the 1k hp was an aftermarket thing. (although 640 is still kind of insane.)