Alfa Romeo 6C 1750 GTC Cabriolet Royale

The Alfa Romeo 6C 1750 GTC Cabriolet Royale, constructed as a one-off bodywork specimen by Pininfarina, is understood to have been built on the Gran Turismo Compressore (GTC) chassis derived from the 6C 1750 series introduced in 1929. While many 6C 1750s were bodied with sporting intentions—featuring raked windscreens, flowing fenders, and competition-derived components—this particular cabriolet reflects a more formal execution, closer in tone to the period’s luxury touring cars than its racing counterparts. The chassis was powered by Alfa Romeo’s well-regarded 1,752 cc inline six-cylinder engine, in this case likely equipped with a Roots-type supercharger as standard on GTC models. The engine, with double overhead camshafts, was mated to a four-speed manual gearbox, driving the rear wheels. Suspension comprised semi-elliptical leaf springs with a rigid axle layout, typical of the era. Braking was via mechanical drum brakes on all four wheels. The body design, while related to other Royale-bodied Alfa Romeo cabriolets by Pininfarina, is more restrained. The lines are notably formal, with a vertical windscreen and upright roof profile. The running boards remain straight rather than swept, contributing to a more rectilinear side silhouette. The wheel arches are rounded and edged in bright chrome trim, a detail that enhances the car’s understated decorative presence. The rear houses a folding fabric top and externally mounted spare wheel, in keeping with contemporary practice. The vehicle’s configuration suggests its intended use as a refined grand tourer rather than a sporting car. It is presumed to have been commissioned for a private client seeking a discreet yet prestigious automobile that benefitted from Alfa Romeo’s advanced engineering while offering the comfort and stature associated with bespoke luxury vehicles. No known duplicate exists, confirming the car’s status as a singular creation within the 6C lineage. The car’s provenance and coachbuilder attribution remain subjects of scholarly and collector interest.