The Wiesmann Roadster MF4 S 4.0 V8 Automatic, produced between 2009 and 2014, represents the high-performance pinnacle of the MF4 Roadster generation. Wiesmann, a German manufacturer known for its handcrafted, retro-styled roadsters, positioned the MF4 S as its flagship model, offering a luxurious and exhilarating driving experience. Built upon a bespoke chassis – not sharing components with larger manufacturers – the MF4 S aimed to deliver a unique blend of British roadster aesthetics and German engineering precision. This variant, equipped with the naturally aspirated 4.0-liter V8 engine and a seven-speed automatic transmission, was the most powerful offering in the MF4 lineup, surpassing the standard MF4 and any potential forced-induction variants.
Powertrain & Engine Architecture
The heart of the MF4 S is the BMW S65 4.0-liter V8 engine, a naturally aspirated powerplant renowned for its high-revving character and robust construction. This engine, bearing BMW internal code S65B40, produces 420 horsepower at 8300 rpm and 400 Nm (295.02 lb-ft) of torque at 3900 rpm. The engine features individual throttle bodies, a high 12:1 compression ratio, and a double-VANOS variable valve timing system on both intake and exhaust camshafts. Fuel delivery is managed by a sophisticated electronic fuel injection system. The engine is longitudinally mounted at the front of the vehicle, contributing to a balanced weight distribution.
The MF4 S utilizes a ZF 7HP90 seven-speed automatic transmission. This transmission is known for its smooth and rapid shifts, and offers both fully automatic operation and manual control via steering wheel-mounted paddles. The transmission is specifically tuned for the high-output V8, providing optimized gear ratios for both acceleration and cruising. The rear wheels are driven via a limited-slip differential, enhancing traction and cornering performance.
Engine Specifications
Key engine specifications include a cylinder bore of 92 mm (3.62 in) and a piston stroke of 75.2 mm (2.96 in), resulting in a displacement of 3999 cm3 (244.03 cu. in). The engine is naturally aspirated, eschewing turbocharging or supercharging in favor of a more linear power delivery. The engine meets Euro 5 emission standards.
Driving Characteristics
The Wiesmann Roadster MF4 S delivers a distinctly engaging driving experience. The combination of the high-revving V8 and the responsive automatic transmission results in brisk acceleration. The 0-100 km/h (0-62 mph) sprint is achieved in 4.4 seconds, while 0-60 mph takes a calculated 4.2 seconds. The car boasts a maximum speed of 293 km/h (182.06 mph). The automatic transmission, while offering convenience, doesn’t sacrifice driver involvement, particularly when utilizing the paddle shifters. The limited-slip differential provides excellent traction, allowing for confident cornering. The relatively lightweight construction (1390 kg / 3064.43 lbs) contributes to the car’s agility and responsiveness. Compared to a hypothetical manual transmission version, the automatic offers slightly reduced driver engagement but maintains a very high level of performance.
Equipment & Trim Levels
The MF4 S was positioned as a premium offering, and as such, came standard with a comprehensive list of features. Interior appointments included high-quality leather upholstery, often customized to the owner’s specifications. The dashboard featured a blend of classic gauges and modern technology, including a navigation system and a premium audio system. Standard equipment also included air conditioning, power windows, and power steering. Optional extras included upgraded leather trim, bespoke paint colors, and a variety of carbon fiber interior accents. The interior was designed to be a luxurious and comfortable space, befitting a high-end roadster.
Chassis & Braking
The MF4 S utilizes a bespoke chassis constructed from steel space frame, providing a rigid and lightweight platform. Suspension is handled by a double wishbone setup at both the front and rear, offering excellent handling characteristics. Ventilated disc brakes are fitted to all four wheels, providing ample stopping power. An Anti-lock Braking System (ABS) is standard. The car rides on 8J x 18 inch wheels, shod with 245/45 R18 tires. The suspension is tuned to provide a balance between comfort and performance, offering a relatively compliant ride while maintaining excellent body control.
Market Reception & Comparison
The Wiesmann Roadster MF4 S was generally well-received by automotive critics, who praised its unique styling, exhilarating performance, and high-quality craftsmanship. However, its high price tag and limited production numbers meant it remained a niche product. Compared to other roadsters of the era, such as the Porsche Boxster or BMW Z4, the MF4 S offered a more exclusive and bespoke experience. Fuel economy, however, was not a strong point, with combined fuel consumption of 12.2 l/100 km (19.3 US mpg). Reliability was generally good, benefiting from the use of proven BMW engine and transmission components, although maintenance costs could be significant due to the car’s specialized nature. The MF4 S’s CO2 emissions were rated at 275 g/km.
Technical Specifications
| Brand | Wiesmann |
| Model | Roadster MF4 S |
| Type (Engine) | S 4.0 V8 (420 Hp) Automatic |
| Start of production | 2009 |
| End of production | 2014 |
| Powertrain Architecture | Internal Combustion engine |
| Body type | Roadster |
| Seats | 2 |
| Doors | 2 |
| Fuel consumption (economy) – urban | 17.9 l/100 km (13.1 US mpg) |
| Fuel consumption (economy) – extra urban | 9 l/100 km (26.1 US mpg) |
| Fuel consumption (economy) – combined | 12.2 l/100 km (19.3 US mpg) |
| CO2 emissions | 275 g/km |
| Fuel Type | Petrol (Gasoline) |
| Acceleration 0 – 100 km/h | 4.4 sec |
| Acceleration 0 – 62 mph | 4.4 sec |
| Acceleration 0 – 60 mph | 4.2 sec |
| Maximum speed | 293 km/h (182.06 mph) |
| Emission standard | Euro 5 |
| Weight-to-power ratio | 3.3 kg/Hp |
| Weight-to-torque ratio | 3.5 kg/Nm |
| Power | 420 Hp @ 8300 rpm |
| Torque | 400 Nm @ 3900 rpm (295.02 lb.-ft. @ 3900 rpm) |
| Engine layout | Front, Longitudinal |
| Engine displacement | 3999 cm3 (244.03 cu. in.) |
| Number of cylinders | 8 |
| Engine configuration | V-engine |
| Cylinder Bore | 92 mm (3.62 in.) |
| Piston Stroke | 75.2 mm (2.96 in.) |
| Compression ratio | 12:1 |
| Engine aspiration | Naturally aspirated engine |
| Kerb Weight | 1390 kg (3064.43 lbs.) |
| Fuel tank capacity | 70 l (18.49 US gal | 15.4 UK gal) |
| Length | 4230 mm (166.54 in.) |
| Width | 1880 mm (74.02 in.) |
| Height | 1190 mm (46.85 in.) |
| Wheelbase | 2507 mm (98.7 in.) |
| Drivetrain Architecture | Rear wheel drive |
| Number of gears and type of gearbox | 7 gears, automatic transmission |
| Front suspension | Double wishbone |
| Rear suspension | Double wishbone |
| Front brakes | Ventilated discs |
| Assisting systems | ABS (Anti-lock braking system) |
| Tires size | 245/45 R18 |
| Wheel rims size | 8J x 18 |
Legacy
The Wiesmann Roadster MF4 S 4.0 V8 Automatic remains a sought-after vehicle among collectors and enthusiasts. The BMW S65 engine is known for its durability and potential for modification, making it a reliable and rewarding powerplant. While maintenance can be expensive due to the car’s specialized nature, the quality of construction and the use of proven components contribute to its long-term reliability. On the used car market, the MF4 S commands a premium price, reflecting its exclusivity and the unique driving experience it offers. It represents a unique chapter in automotive history, showcasing a commitment to handcrafted luxury and high-performance engineering.
