Wiesmann Roadster MF4 4.4 V8 (407 Hp) Automatic

The Wiesmann Roadster MF4 4.4 V8 (407 Hp) Automatic is a high-performance roadster produced by the German manufacturer Wiesmann between 2009 and 2014. Representing the pinnacle of Wiesmann’s open-top offerings during this period, the MF4 combined a powerful twin-turbocharged V8 engine with a luxurious interior and distinctive styling. It was positioned as a premium, hand-built alternative to mainstream sports cars, appealing to buyers seeking exclusivity and a unique driving experience. The “MF4” designation stands for “Most Flexible Four,” referencing the model’s chassis and the flexibility in customization options offered to buyers.

Powertrain & Engine Architecture

The heart of the Wiesmann Roadster MF4 4.4 V8 is a 4.4-liter (4395 cm3 / 268.2 cu. in.) V8 engine, internally designated as the S62B50. This engine originated from BMW’s M division, specifically derived from the E60 M5. However, Wiesmann significantly modified the engine, adding twin turbochargers and an intercooler to substantially increase its output. The engine boasts a compression ratio of 10:1 and features a longitudinal front engine layout.

The engine produces 407 horsepower at 5500-6400 rpm and a substantial 600 Nm (442.54 lb.-ft.) of torque between 1750 and 4500 rpm. This broad torque curve contributes to the car’s impressive acceleration. Fuel is delivered via a sophisticated fuel injection system, and the engine utilizes a dual overhead camshaft (DOHC) valvetrain. The engine meets Euro 5 emission standards.

The MF4 is equipped with a 6-speed automatic transmission. While the specific transmission unit is a ZF 6HP26, Wiesmann recalibrated the transmission’s software for quicker shifts and a more responsive driving experience. The transmission is rear-wheel drive, contributing to the car’s dynamic handling characteristics.

Driving Characteristics

The Wiesmann Roadster MF4 4.4 V8 delivers exhilarating performance. The combination of the twin-turbo V8 and the well-tuned automatic transmission results in a 0-60 mph (0-96 km/h) time of approximately 4.4 seconds, and 0-100 km/h (0-62 mph) in 4.6 seconds. The car achieves a maximum speed of 291 km/h (180.82 mph). The automatic transmission provides smooth and relatively quick gear changes, although it doesn’t offer the direct control of a manual gearbox.

The car’s relatively low weight (1455 kg / 3207.73 lbs.) and rear-wheel-drive configuration contribute to a balanced and engaging driving experience. The chassis is designed for agility, and the car feels planted and responsive in corners. The turbochargers provide a noticeable boost in power, delivering strong acceleration throughout the rev range. However, the car’s weight and the nature of the automatic transmission mean it doesn’t possess the raw, visceral feel of some lighter, more focused sports cars.

Equipment & Trim Levels

The Wiesmann Roadster MF4 4.4 V8 was largely a bespoke vehicle, with a high degree of customization available to buyers. Standard equipment included leather upholstery, air conditioning, power windows, and a premium audio system. The interior was hand-finished and featured a high level of craftsmanship.

Optional extras were extensive and could include features such as navigation systems, upgraded audio systems, custom paint colors, and unique interior trim materials. Buyers could specify a wide range of interior finishes, including different leather colors and wood veneers. The dashboard layout was relatively simple and focused on the driver, with a clear instrument cluster and intuitive controls. The car’s emphasis was on providing a luxurious and personalized driving experience.

Chassis & Braking

The Wiesmann Roadster MF4 utilizes a steel space frame chassis, designed to provide a high level of rigidity and safety. The suspension system consists of double wishbones at both the front and rear, providing excellent handling and ride comfort. The suspension was tuned to balance performance and everyday usability.

The braking system features ventilated discs on all four wheels, coupled with an Anti-lock Braking System (ABS). The brakes provide strong and consistent stopping power, essential for a car of this performance level. The car rides on 245/45 R18 tires mounted on 8J x 18 inch wheel rims.

Market Reception & Comparison

The Wiesmann Roadster MF4 4.4 V8 was generally well-received by automotive critics. It was praised for its powerful engine, luxurious interior, and distinctive styling. However, some critics noted the car’s relatively high price and the fact that it wasn’t as focused on outright performance as some of its rivals.

Compared to other trims in the Wiesmann lineup (which were less common), the 4.4 V8 Automatic represented the top-of-the-range model, offering the highest level of performance and luxury. In terms of fuel economy, the MF4 4.4 V8 is not particularly efficient, with combined fuel consumption of 12.3 l/100 km (19.1 US mpg / 23 UK mpg). CO2 emissions are rated at 285 g/km. Reliability is generally good, given the car’s hand-built nature and the proven BMW engine technology, but maintenance costs can be high due to the specialized components and limited parts availability.

Technical Specifications

Legacy

The Wiesmann Roadster MF4 4.4 V8 Automatic remains a desirable and relatively rare sports car. The BMW-derived engine is known for its reliability, although regular maintenance is essential. The car’s hand-built nature and limited production numbers contribute to its collectibility. In the used car market, prices vary depending on condition, mileage, and the level of customization. The MF4 represents a unique chapter in Wiesmann’s history, showcasing the company’s commitment to building high-performance, luxurious roadsters. While Wiesmann faced financial difficulties in subsequent years, the MF4 continues to be appreciated by enthusiasts for its distinctive character and exhilarating driving experience.