Cadillac Sixteen Concept
Each one of the concept cars featured here proved itself not only as a showstopper but also as an influential piece of modern art. However, in the case of Cadillac’s Sixteen Concept car, GM should put this car into a museum of contemporary art where it would be exhibited as one of the most elegant creations of the early 21st century (via Auto Evolution).
The Sixteen Concept was revealed in 2003 as a super luxury sedan with a V16 engine under the butterfly-opening hood. The car was modern but felt classic and more in sync with legendary Cadillacs of the ’20s and ’30s than with contemporary models. The initial response was so good that Cadillac considered full-scale production but unfortunately, nothing happened.