A Splash of Speed: The Legacy of Ferrari’s Arno XI Hydroplane
Rediscovering a Racing Icon
In the annals of speed records, one extraordinary vessel holds a unique place—the Ferrari Arno XI hydroplane. This remarkable boat, powered by none other than a Ferrari F1 engine, set a series of records over 70 years ago that still stand today. The narrative behind this high-speed wonder intertwines with the great Enzo Ferrari and his fervor for competition.
Our journey begins in 1953, with Achille Castoldi, Italy’s preeminent boat racer. Castoldi, whose racing feats date back to the 1940s, sought the renowned Ferrari factory to acquire an F1-spec V12 engine. This powerful heart, which helped propel Ferrari to the 1952 Formula 1 championship, cranked out an impressive 385 horsepower. The engine was fittingly housed in the Arno XI—a sleek three-point hydroplane crafted by the Cantieri Timossi boatyard. Completed in Ferrari’s iconic Rosso Corsa color, the vessel was not only a visual spectacle but also a marvel of engineering, with a wooden frame cohesively augmented by a metal substructure and exquisite mahogany details.
Initially facing stiff competition and faltering in his first record attempt, Castoldi returned to Ferrari for an upgrade. With the expertise of Ferrari’s chief race engineer, the V12 was retooled to unleash an astounding 600 horsepower, fueled by methanol and boosted by twin superchargers. This revamping enabled Castoldi to set an astonishing two-way record in the flying kilometer, reaching speeds of 241.708 km/h (150.19 mph), alongside another milestone in the 24 nautical mile event. After these triumphs, Castoldi would eventually retire, placing the Arno XI into storage—a brief pause in its storied legacy.
The Evolution of the Arno XI
Years passed before the Arno XI would once again be thrust into the spotlight. In the late 1960s, Nando Dell’Orto took charge of the hydroplane, enhancing its capabilities with a new engine upgrade and a rear stabilizing fin. Under Dell’Orto’s stewardship, the Arno XI clinched the 1963 European Championship and shrugged off several lap records. Though not categorized among the absolute fastest motorboats, it was undeniably groundbreaking for its time.
As Dell’Orto stepped away from racing in 1968, the Arno XI found itself tucked away in a warehouse for decades. Fortunately, in the 1990s, a dedicated new owner undertook a meticulous restoration, certified for historical accuracy by Ferrari Classiche. In 2012, the hydroplane impressed at auction, fetching over $1 million. Later, in 2019, it resurfaced for sale again, with a jaw-dropping asking price of around $12 million.
Today, the Arno XI stands not only as a historical championship-winning boat but also as a cherished emblem of Ferrari’s legacy in motorsport. Its unmatched speed records and unique status as the sole racing boat powered by a Ferrari F1 engine solidify its singular role in the company’s illustrious history. Currently residing in Austin, Texas, this speedster occasionally graces public events, a living testament to the high-octane era of automotive and marine engineering.
As we celebrate the enduring legacy of the Arno XI, we’re reminded of how this one-of-a-kind hydroplane transformed the world of high-speed boating, leaving an indelible mark that continues to captivate enthusiasts and historians alike.