Nineteen thirty-one is widely considered by many as the high point of Cadillac’s Classic Era presence.

The American luxury automaker introduced a new V-12 series to fill the gap between its existing V-8 and V-16 models, and this proved the beginning of Cadillac’s domination of the luxury car segment.

The engines in the V-12 and V-16 shared parts, as well as dimensions and angles, so production didn’t have to proceed from scratch.

From its 368 cubic inches, Cadillac’s new V-12 produced 135 horsepower and 285 pound-feet of torque, enabling a top speed of 80 mph.

The Twelve was nearly the performance equal of the Sixteen, offering strong torque and a similar top speed.

Despite tough economic times, the V-12 sold surprisingly well, though at the expense of the larger and pricier V-16.

A V-12 Roadster piloted by Cadillac test chief Willard Radar even paced the 1931 Indianapolis 500.

Delivered new to Don Lee Cadillac in October 1931, this exceptional Series 370-A V-12 Roadster is one ...