The Pierce-Arrow Model 66 stands tall as one of the greatest performance automobiles of the Brass and Nickel Eras.

Its power came from a massive T-head inline-six-cylinder engine that, at its introduction in 1910, displaced an already immense 714 cubic inches.

Remarkably, by 1912, it had grown larger still, displacing nearly 825 cubic-inches.

For some years, the Model 66 was noted by Guinness World Records as having the largest engine of any production automobile—larger, even, than the famed Bugatti Type 41 Royale.

More importantly, the Pierce-Arrow 66 remains virtually unequaled among automobiles of the period in terms of its power and scale.

Its nearly 100 brake horsepower and prodigious torque are capable of moving it effortlessly alongside modern traffic, with the passengers literally riding head and shoulders above the rest.

The late Pierce-Arrow Society historian Bernard Weis’ decades of research indicate that about 200 examples of the 1912–1913 66-A were produced, 53 of wh...