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1911 Hispano Suiza 15T Alfonso (original condition)

The 1911 Hispano-Suiza 15T Alfonso refers to a model of the Hispano-Suiza Alfonso XIII, a groundbreaking early sports car developed by Marc Birkigt. The Type 15T engine was a four-cylinder inline engine that powered these successful race cars, and the model was named for its admirer, King Alfonso XIII of Spain. This model, also known as the 45cr in its race version, was a lightweight and successful motorsport competitor, arguably laying claim to being one of the first true sports cars.

 

Key Characteristics:

Type 15T Engine:

A four-cylinder, water-cooled, cast iron engine with a T-head valve gear, producing 64 horsepower.

Monobloc Construction:

It featured a monobloc four-cylinder engine, a novel design that simplified construction and created a lighter, stronger, and more durable engine.

Sports Car Pedigree:

The 15T model was derived from a series of successful long-stroke four-cylinder racing cars, establishing the Alfonso XIII as one of the first real sports cars.

Royal Connection:

King Alfonso XIII of Spain was a loyal customer, and his purchase of a Type 15T in 1912 led to the model being named the Alfonso XIII.

 

Significance:

Pioneering Design:

The Alfonso XIII was significant for its advanced engine design, a pioneering effort by Marc Birkigt that would influence future engine development.

Motorsport Success:

The car achieved considerable success in various voiturette races, further solidifying its reputation as a high-performance vehicle.

Luxury and Elite Appeal:

Due to its cost, the Alfonso XIII was only affordable to the elite and was considered a symbol of luxury and prestige.

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Uploaded on September 7, 2025
Taken on August 31, 2025