Italian coachbuilder Castagna Milano is considering transforming the Alfa Romeo Giulia Quadrifoglio into a two-seat, two-door sports car with a folding soft top. The project remains theoretical and would require a Giulia owner willing to have the sedan extensively rebuilt.

Castagna Milano traces its origins to 1849, when it produced horse-drawn carriages for wealthy clients. After the original company closed in 1954, the name returned in the early 2000s and became associated with bespoke versions of models from Fiat, Peugeot, and other manufacturers.

A heavily reworked Giulia

The proposed conversion would make major changes to the Giulia’s proportions. Castagna Milano envisions moving the front seats, steering wheel, and dashboard 330 millimeters toward the rear axle. That change would create a longer hood while also altering the car’s weight distribution.

The design shown in renderings combines Alfa Romeo’s triangular grille with dark air intakes, a prominent chin spoiler, and claw-shaped LED daytime running lights reminiscent of current Peugeot models. The replacement body panels would be made from carbon fiber.

Removing the rear doors could reduce the vehicle’s weight to approximately 1,420 kilograms, according to the proposal. The renderings also depict new front and rear quarter panels, large custom doors, and bespoke wheels.

Convertible body and Quadrifoglio hardware

At the rear, the concept features slim LED lights, stacked exhaust outlets styled after those on the Giulia Quadrifoglio, and a carbon-fiber diffuser. Unlike the fixed-roof sedan, the proposed Castagna version would use a folding soft top.

The coachbuilder has not explained how the open body would be reinforced. Converting the Giulia to a convertible could require additional chassis strengthening to limit unwanted flex.

The proposal would retain the Giulia Quadrifoglio’s twin-turbocharged 2.9-liter V6, also used in the Stelvio Quadrifoglio. The source describes the engine as producing a distinctive sound, while the broader project remains dependent on finding an owner prepared to commission the conversion.

Castagna Milano’s Giulia-based sports car is not a confirmed production model. It joins the company’s design proposal for the Alfa Romeo Cuorerosso, another project that the source suggests could potentially become a road-going vehicle if developed beyond the concept stage.