You Will Not Believe What This M4 Convertible Has Become!

The legendary Italian design house Zagato has teamed up with a new name in the world of coachbuilding, and the result is something that stands apart even among the rarest automobiles shown at the Concorso d’Eleganza Villa d’Este. Meet the Bovensiepen Zagato—a coachbuilt masterpiece that blends German performance with Italian flair in a stunning way.

Behind the Bovensiepen name are brothers Andreas and Florian Bovensiepen, the sons of Burkard Bovensiepen, the man behind the iconic Alpina brand. After Burkard’s passing in October 2023 and Alpina becoming part of the BMW Group, the next generation decided to launch a fresh venture. Still based in Buchloe, their new firm’s debut project is this beautiful creation based on the BMW M4 Convertible, built in close collaboration with Zagato.

Rather than choosing the M4 Coupe as their canvas, the Bovensiepen team began with the M4 Convertible. They removed its electrically retractable fabric roof and went for a distinctive, clean look by embracing Zagato’s iconic double-bubble roof—an aerodynamic design that harks back to the 1950s. One of the key visual cues that give away its convertible roots is the absence of B-pillars and the rear-side windows that can fully drop, resulting in a sleek pillarless profile.

While the silhouette remains unmistakably M4, almost every panel has been replaced. A redesigned front end features an elongated hood with a unique U-shaped vent, and most of the body is formed from lightweight carbon fiber. The controversial large kidney grilles are nowhere to be found, which, let us be honest, is a welcome change. The rear has been completely reworked with a sculpted diffuser and dual exhaust tips integrated into a titanium Akrapovič exhaust system. This new setup is 40 percent lighter than the stock M4 exhaust and adds a sharp, aggressive note to the car’s sound.

It rides on custom 20-inch forged wheels, and the curvature of the rear glass combined with the integrated ducktail-style spoiler adds to its exotic vibe. Even with all these changes, the laser taillights are a subtle nod to the car’s BMW origin.

Inside the cabin, the interior is very much BMW at heart. However, it is dressed in exclusive details such as deep blue leather and Alcantara, bringing a sense of occasion and custom craftsmanship. It might not hide its roots, but that is not the goal—it is about enhancing what is already a well-built foundation.

Under the hood, the familiar twin-turbocharged 3.0-liter inline-six has been upgraded to push out 602 horsepower and 516 pound-feet of torque. That is more powerful than the 3.0 CSL and even torquier than the new M4 CS. Bovensiepen claims it can sprint from zero to sixty-two miles per hour in just 3.3 seconds, and it can reach a top speed of over 186 miles per hour. As it is based on the convertible, it uses the same automatic transmission and all-wheel drive configuration.

The transformation process is not just a quick makeover. Each Bovensiepen Zagato takes over 250 hours to complete. With that kind of craftsmanship and exclusivity, expect it to cost well beyond the $100,000 base price of the regular M4 Convertible. Official pricing and production numbers will be announced in the fourth quarter of this year, and the first deliveries are set for the second quarter of next year.