The industrial giant that built America's biggest trains and a car icon

Countries & Cities · Published 15 October 2026 · Updated 25 October 2026 Swipe more like this →

In short: From the massive 'Big Boy' locomotives to the origins of the Chrysler Corporation, the American Locomotive Company was a titan of heavy industry. It didn't just move freight; it pioneered diesel technology, manufactured nuclear reactors, and shaped the landscape of 20th-century transportation through sheer engineering scale.

Formed in 1901 by financier Pliny Fisk Sr., the American Locomotive Company (ALCo) was a strategic merger of seven manufacturers designed to challenge the Baldwin Locomotive Co. Headquartered in Schenectady, New York, AlCo became a powerhouse of production, manufacturing over 75,000 locomotives. While it produced more steam engines than any U.S. company except Baldwin, its legacy is defined by engineering extremes: it built some of the largest locomotives ever constructed, including Union Pacific's 'Big Boy,' and the fastest American streamliners for the Milwaukee Road.

AlCo was a pioneer in mechanical innovation and diversification. A partnership involving Ingersoll-Rand and General Electric saw this firm manufacture a diesel–electric switch engine that achieved commercial success during 1924. The Timken 1111 was manufactured by the company as North America's second steam locomotive featuring roller bearings in production. Beyond rails, AlCo ventured into automobiles as early as 1905, producing French Berliet designs. Though this venture was unprofitable and ended in 1913, it served as a critical training ground for Walter P. Chrysler, who later founded the Chrysler Corporation.

The company's decline illustrates the high stakes of industrial competition. During World War II, AlCo ranked 34th among U.S. corporations in wartime production value, even building locomotives for the USSR and Iran. However, it struggled to maintain a lead in mainline diesel power against General Motors' Electro-Motive Division (EMD). Despite developing the versatile RS-1 road–switcher and pioneering AC/DC transmissions, AlCo was eventually eclipsed by its former ally, General Electric, which entered the domestic market in 1960. The company officially went out of business in 1969.

Today, while AlCo is defunct, its engineering DNA persists. The Montreal Locomotive Works continues to manufacture locomotives based on original Alco designs, and the brand name survives through Fairbanks Morse Engine's FM|Alco line.

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