Arno XI Ferrari Boat
You may not know it, but Ferrari powered a powerful Hydroplane back in the 1950s. It was built for one thing: breaking the World Speed Record on the water. Achille Castoldi, a racing champion, proposed such a boat to the one and only Enzo Ferrari who agreed to help him in the endeavor.
Arno XI, was built to shatter the speed record in the 800-kg class. Achille Castoldi had been setting records on the water since 1940. To achieve the speed record, he commissioned Cantieri Timossi to build a 3-point hydroplane from hardwood, covered in a mahogany veneer. When Enzo heard he had painted the upper body in Ferrari Red, the Scuderia F1 team was sent to lend their expertise. This culminated in a world record in the flying kilometer: 150.49 mph, which still stands to this day.
Initially, Castoldi had planned to use a Ferrari engine, so he purchased a 4.5L V12. It was identical to the 385 horsepower “Lampredi” engine used in the Ferrari 375. Once Enzo realized he was going for the record, he sent his Chief Engineer along with a race-prepped Grand Prix engine. Stefano Meazza and a few of the Scuderia team members realized they needed more power. Using lessons learned on the track, they nearly doubled the compression ratio to handle methanol. A hotter spark was needed, so the distributors and coils were replaced by twin magnetos. Each cylinder had twin spark plugs to ensure a clean burn. It wasn’t enough, so two giant superchargers were driven by the crankshaft. Each one had its own Weber 4-Barell modified to dump meth into the engine with an air/fuel ratio of 5:1. What started at 385 horsepower made between 550 and 600 in race tune.
Once he broke the record, Castoldi built another boat for a different class. However, the engine exploded and he retired from racing. The Arno XI was sold to Nando dell’Orto, an engineer who revised the aerodynamics for better stability. After adding a few pounds, he came in 2nd place for the 900 kg class in 1965. It has since been seen occasionally at boat shows doing parade laps, and it led a peaceful retirement. But because it is the only boat to ever have been powered by Scuderia Ferrari, it is being completely restored by Ferrari Classiche.
For decades, duPont REGISTRY has selected only the greatest automobiles as cover cars. This is the 1st time in 35 years, that we have chosen a boat to be featured on our Autos Magazine cover. But, this is no ordinary boat. Due to the prominence of this Ferrari Arno XI in automotive and boating history, it more than deserves to be on the duPont REGISTRY . What's more, now is the extremely rare chance to own this Ferrari boat that has graced the cover of duPont REGISTRY.