One-off vehicle

Generally the model is made on a small or large series, with significant technical, functional and aesthetic variations between each unit.

Some cases of non-legalized vehicles may be included in this article if they have particularly noticeable characteristics, such as engine, chassis, and body types.

[1] First used in 1934,[2] this term is employed to differentiate singular items from those in a series: e.g. "the Lincoln Futura was a one-off".

It has been suggested that it is a misspelling of "one-of", but this etymology is not supported by sources such as the Oxford English Dictionary.

Designed by engineer Giuseppe Merosi, it had a 4-cylinder in-line engine (with camshaft and cylinder head) and provided 70 hp (52 kW) with a top speed of 125 km / h. In the racing version, the power reached 73 hp (54 kW) and a speed of 137 km / h. In 1914 the Milanese count Marco Ricotti commissioned an aerodynamic body to the specialized firm Castagna that allowed the speed of 140 km / h. This unique model was officially called "aerodynamics" and popularly was " Siluro Ricotti.

According to the designer, Mark Birkit, this solution (apparently less sophisticated than the camshafts in the cilinde head) was chosen as less noisy.

[11] American James Glickenhaus commissioned Pininfarina to create a special P3 racing body.