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The Bovensiepen 05 GT takes the already formidable BMW M5 Touring and elevates it into a fully bespoke grand tourer. The Bovensiepen name may be unfamiliar to some, yet BMW enthusiasts know the family well. When BMW absorbed Alpina into the fold, the Bovensiepen crew acted quickly, putting their own name above the door while keeping their tradition of building rare, high-performance machines alive. Their first effort was the Zagato, a coachbuilt coupé based on BMW M4 underpinnings, and this estate marks their bold second chapter.
To sharpen the 05 GT’s character, Bovensiepen brought in Frank Stephenson, the designer behind the original BMW X5 and the reborn Mini Cooper, with Ferrari, Maserati and McLaren also on his impressive CV. His influence is clear from the front, where a striking stainless-steel grille meets larger air intakes and purposeful bodywork. A wraparound design line ties the lower body together, and buyers can specify a contrasting shade for that accent or match it to the paint for a more understated finish.
The estate rides on custom 21-inch forged wheels with a multi-spoke design, while a titanium Akrapovi? exhaust with four oval tailpipes signals that this is no ordinary load-lugger. Step inside, and each car receives its own numbered plaque, with the cabin trimmed generously in leather. A hand-finished Lavalina steering wheel sits ahead of aluminium paddles, and the personalisation list runs deep. Owners can choose their leather colour, add bold stitching, request embroidery or pick custom trim, reinforcing that genuine coachbuilt feel throughout.
True to the Alpina spirit, Bovensiepen went far beyond mere cosmetics. Engineers reworked the intake, refined the software and freed up the Akrapovi? exhaust to breathe more easily. The result is a remarkable 790bhp paired with 811lb-ft of torque, comfortably eclipsing the standard M5 Touring. Bovensiepen claims the 05 GT will sprint from 0 to 62mph in under 3.6 seconds before pressing on to a top speed of 190mph, figures that place this estate firmly among the most potent of its kind.
The chassis has received equal attention, with tuned suspension, Eibach springs, revised bearings and bespoke Pirelli tyres carrying BOV markings. The goal is sharper handling without sacrificing the long-distance comfort expected of a true grand tourer. Deliveries of the Bovensiepen 05 GT are set to begin in late 2026, offering a rare blend of estate practicality and supercar-rivalling pace. For those seeking exclusivity wrapped around proven BMW M engineering, this distinctive wagon makes a compelling case.
