Bonhams|Cars Bonmont 2025 Preview
Bonhams|Cars is set to host its annual Swiss auction on Sunday, June 29, 2025, at the Bonmont Golf & Country Club, which is about 30 minutes from Geneva. This event is expected to draw in car enthusiasts and collectors from around the world, featuring a selection of classic cars that have been carefully chosen for their condition or restoration.
The auction will include 41 classic vehicles, covering a broad range of years, from sports cars of the 1930s to modern hypercars. The lineup includes models from well-known brands like Aston Martin, Bugatti, Ferrari, Lamborghini, Mercedes-Benz, and Porsche, so there should be something for every interest. Notably, many of these lots won’t have a reserve price, giving collectors some exciting chances to bid at the 2025 Bonmont Sale.
Introduced in 1969, the Dino 246 series — comprising the GT and GTS variants — was a departure for Ferrari in several key ways, most notably by featuring a mid-mounted V6 engine rather than the traditional V12, and by not initially bearing the Ferrari badge.
Named in honor of Enzo Ferrari’s late son, Alfredo “Dino” Ferrari, who was instrumental in the development of the V6 engine, the Dino was conceived as a more accessible, albeit still high-performance, sports car. Its stunning Pininfarina-designed bodywork, characterized by sensuous curves and a remarkably balanced silhouette, quickly garnered immense admiration. The 2.4L V6 engine provided a lively soundtrack and a surprisingly potent driving experience, making the Dino a true driver’s car.
The 1974 Ferrari Dino GTS being offered by Bonhams|Cars at their Bonmont Sale is one of 29 delivered in Celeste Metallizzato. Originally delivered in the US market, it was acquired by its current European owner in 2002 and benefits from a thorough restoration completed in Sweden. It remains a matching-numbers example of the best Dino model produced by Ferrari.
Estimate: $560,000 – $620,000
This particular Porsche 930 Turbo stands out as an exceptionally rare and desirable example, being one of a just 19 produced with the highly coveted ‘flat nose’ option. This distinctive aerodynamic front-end treatment, inspired by Porsche’s racing cars of the era, replaces the traditional sloped headlights with pop-up units, giving the car a more aggressive and unique silhouette. The ‘flachbau’ option was a costly factory customization, making these cars particularly sought after by collectors.
The car boasts a well-documented history. It was originally delivered as a US-specification model and was subsequently imported to Switzerland in 1990. Since its production, this 911 Turbo Targa has had a total of three conscientious owners, indicating a history of careful stewardship. Its consistent maintenance records further attest to the care it has received throughout its life.
The vehicle presents in excellent condition, reflecting meticulous maintenance. A comprehensive service was performed as recently as June 2025, ensuring its mechanical readiness. The odometer currently reads a modest 63,000 kilometers, a relatively low mileage for a car of this vintage, suggesting it has been enjoyed but not excessively driven.
Adding significantly to its appeal and value, the car comes with a substantial collection of original documentation and accessories. This includes its original service book, providing a detailed record of its maintenance history, as well as the original tool kit. Three keys are provided, along with the Swiss Carte Grise (registration document), recent invoices detailing the latest services, and crucially, the owner’s manual which features the rare ‘flachbau’ supplement — a testament to its authenticity and factory specification.
Estimate: $210,000 – $270,000
The 2014 Spyker C8 Spyder is a testament to bespoke craftsmanship and automotive artistry from the Netherlands. Spyker, with roots dating back to 1898 as coachbuilders before venturing into automobile manufacturing, has always focused on ultra-low volume, high-performance vehicles. This particular C8 Spyder exemplifies that philosophy, being a rare sight on the road.
This Spyker C8 Spyder has been exceptionally well-preserved, having covered fewer than 3,600 kilometers since new. This remarkably low mileage suggests the car has been sparingly used and meticulously cared for. Its condition is further highlighted by a full service completed in December 2022, indicating proactive maintenance.
At the heart of the C8 Spyder is a potent 4.2L Audi V8 engine, which produces approximately 400 horsepower. This power unit enables the car to achieve a top speed of around 300 km/h (186 mph), offering exhilarating performance. The engineering prowess of Spyker is evident in the C8’s construction. It features an ultra-stiff spaceframe chassis, meticulously crafted from a combination of aluminum sheet and extrusions. The elegant aluminum body panels were supplied by renowned specialists, Coventry Prototype Panels in the UK and Karmann in Germany, underscoring the international collaboration in its high-quality construction.
The car is presented in a striking white exterior finish, which beautifully contrasts with its luxurious brown/camel quilted leather interior. This bespoke interior design is a signature of Spyker, known for its intricate detailing, aviation-inspired elements, and a level of craftsmanship rarely seen in modern automobiles.
Demonstrating ongoing commitment to its pristine condition, the car underwent significant maintenance in February 2024. This included a comprehensive overhaul of the fuel system and replacement of the headlamps by Rebellion Motors, at a substantial cost of CHF 14,000. Detailed invoices for this work are available, providing transparency and confirming the care invested in the vehicle. The car is fully approved and registered for road use in Switzerland, making it ready for immediate enjoyment. It comes complete with all its original equipment, further enhancing its appeal to collectors seeking authenticity.
Estimate: $500,000 – $560,000
The 1971 Intermeccanica Italia Spyder stands as a fascinating example of an “Italo/American hybrid,” combining Italian design flair with robust American power. Its beautiful lines were penned by the renowned Italian designer Franco Scaglione, known for his work with Bertone and Alfa Romeo, giving the car a distinct European aesthetic.
Underneath its sculpted bonnet lies a potent 351 cubic inch Ford V8 engine. This American powerplant provides strong performance, blending muscle car grunt with Italian sports car agility. The vehicle is believed to retain its original Cleveland V8 engine.
This particular Italia Spyder boasts several notable and uncommon engineering enhancements. It is equipped with a Doug Nash five-speed gearbox, a significant upgrade that offers more precise shifts and improved driving dynamics compared to the standard transmission often found in other Italias. Furthermore, the car features a sophisticated four-link Panhard rod rear suspension combined with adjustable coil-over shock absorbers. These advanced suspension components are not commonly seen on other Italia models, suggesting a focus on enhanced handling and ride quality. A distinctive design element, found uniquely on this car, is the integration of recessed Ferrari Dino 246 tail lights, adding a subtle nod to Italian supercar design.
Intermeccanica was founded by Hungarian-born American Frank Reisner, who envisioned blending the finest aspects of Italian style and engineering with reliable American mechanicals. This philosophy is perfectly embodied by the Italia Spyder. This specific vehicle underwent an extensive restoration in the USA, ensuring its condition and preserving its original charm. Since 2022, it has been registered in Switzerland, indicating its recent relocation and continued enjoyment.
Estimate: $150,000 – $170,000
The 1966 NSU Wankel Spyder holds a unique and important place in automotive history as the world’s first production car to be powered by a rotary engine. Launched initially in 1963, this model was a groundbreaking innovation, showcasing Dr. Felix Wankel’s revolutionary rotary ‘piston’ concept. Unlike conventional reciprocating piston engines, the Wankel engine utilizes a three-convex-sided rotor that rotates eccentrically within a figure-of-eight-shaped chamber, offering a smooth, compact, and powerful design for its size. This specific car carries chassis number 5601727 and engine number KKM 502, identifying it as one of these pioneering vehicles.
Beyond its engineering marvel, the Wankel Spyder also boasts a sophisticated aesthetic. Its attractive coachwork was designed by the renowned Italian design house, Carrozzeria Bertone. Bertone’s influence is evident in the car’s clean lines and balanced proportions, giving it a sporty yet elegant appearance that belies its compact dimensions.
This particular example is presented in a striking red exterior finish, which beautifully highlights its sleek design. The vibrant red paint is complemented by a stylish red and black vinyl interior, creating a cohesive and appealing color scheme. A black fabric hood provides contrast and functionality, allowing for open-top motoring.
The car’s recent history includes its acquisition by the current vendor in 2022, becoming a part of their esteemed collection. It comes with current Swiss registration documents, indicating its road legality and readiness for enjoyment in Switzerland.
More than just a classic car, this 1966 NSU Wankel Spyder is a significant piece of automotive history. Its status as the first rotary-engined production car, combined with its elegant Bertone design and attractive color combination, makes it a highly desirable and intriguing collector’s item for enthusiasts of unique engineering and classic European sports cars. It’s being offered with no reserve at the upcoming Bonmont Sale by Bonhams|Cars.
Estimate: $25,000 – $37,000