Cadillac has never been shy about chasing excess, but one of its boldest engines never made it to the showroom. In the 1960s the brand developed an overhead cam V12 so large and complex that it ...

Cadillac has its fair share of outrageous concept cars that never made it to production. The American automaker has an extensive catalog of outlandish concept cars, like the futuristic 1959 Cyclone ...