The Wiesmann Roadster MF4-S is a convertible/cabriolet with 2 doors and a front mounted powerplant which transmits the power through the rear wheels.
It's powered courtesy of a naturally aspirated engine of 4 litre capacity. This unit features double overhead camshaft valve gear, a 90 degree V 8 cylinder layout, and 4 valves per cylinder. It develops 414 bhp (420 PS/309 kW) of power at 8300 rpm, and maximum torque of 400 N·m (295 lb·ft/40.8 kgm) at 3900 rpm.
The engine transmits power to the wheels via a 6 speed manual transmission.
Stated weight at the kerb is 1315 kg.
It is claimed to attain a top speed of 293 km/h (182 mph), officially quoted fuel consumption figures are 14.3/7.0/9.6 l/100km urban/extra-urban/combined, and carbon dioxide emissions are 295.0 g/km.
Full specs
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| bodywork | |||
|---|---|---|---|
| Body type | 2 seater convertible/cabriolet | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2507 mm | 98.7 inches | |
| Track/tread (front) | |||
| Track/tread (rear) | |||
| Length | 4230 mm | 166.5 inches | |
| Width | 1880 mm | 74 inches | |
| Height | 1190 mm | 46.9 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.69 | ||
| Kerb weight | 1315 kg | 2899 lb | |
| Weight distribution | |||
| fuel tank capacity | 70 litres | 15.4 [18.5] UK [US] gal. | |
| aerodynamics | |||
| Drag coefficient | |||
| Frontal area | |||
| CdA | |||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | BMW | ||
| Engine code | S65B40 | ||
| Cylinders | V 8 in 90° vee | ||
| Capacity | 4 litre 3999 cc (244.034 cu in) |
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| Bore × Stroke | 92 × 75.2 mm
3.62 × 2.96 in |
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| Bore/stroke ratio | 1.22 | ||
| Valve gear | double overhead camshaft (DOHC)
4 valves per cylinder 32 valves in total |
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| maximum power output | 420 PS (414 bhp) (309 kW) at 8300 rpm |
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| maximum torque | 400 Nm (295 ft·lb) (40.8 kgm) at 3900 rpm |
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| Specific output | 77.2 kW/litre 105 ps/litre 103.5 bhp/litre 1.7 bhp/cu in |
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| Specific torque |
100.03 Nm/litre
1.21 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | wet sumped | ||
| compression ratio | 12:1 | ||
| Fuel system | direct petrol injection | ||
| bmep (brake mean effective pressure) | 1257 kPa (182.3 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 499.88 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | Y | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | 4.4 s | ||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | 293 km/h (182 mph) | ||
| Power-to-weight ratio | Higher is better 319.21 PS/tonne (1000 kg) 0.32 PS/kg 234.77 kW/tonne (1000 kg) 0.23 kW/kg 314.83 bhp/tonne (1000 kg) 0.31 bhp/kg 0.14 bhp/lb |
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| Weight-to-power ratio | Lower is better 4.26 kg/kW 7.11 lb/bhp |
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| fuel consumption | |||
| Fuel consumption | 14.3/7.0/9.6 l/100km urban/extra-urban/combined | ||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | 14.3/7.0/9.6 l/100km urban/extra-urban/combined | ||
| km/litre | 7.0/14.3/10.4 km/l urban/extra-urban/combined | ||
| UK MPG | 19.8/40.4/29.4 UK MPG urban/extra-urban/combined | ||
| US MPG | 16.4/33.6/24.5 US MPG urban/extra-urban/combined | ||
| Carbon dioxide emissions | 295.0 g/km NEDC | ||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | M | ||
| CO2 Effizienz (DE) | G | ||
| chassis | |||
| Engine position | front | ||
| Engine layout | longitudinal | ||
| Drive wheels | rear wheel drive | ||
| Torque split | N/A | ||
| Steering | power assisted rack & pinion | ||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | I.DW.CS.ARB. | ||
| Rear suspension | I.DW.TA.CS.ARB. | ||
| Wheel size front | 8 x 18 | ||
| Wheel size rear | 8 x 18 | ||
| Tyres front | 245/45 x 18 | ||
| Tyres rear | 245/45 x 18 | ||
| Brakes F/R | VeDi/VeDi-S-ABS | ||
| Front brake diameter | |||
| Rear brake diameter | |||
| Braked area | |||
| Gearbox | 6 speed manual | ||
| Top gear ratio | |||
| Final drive ratio | 3.85 | ||
| general | |||
| Carfolio.com ID | 235235 | ||
| Production total | |||
| Model code | |||
| RAC rating | 42.0 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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2010 Wiesmann Roadster MF4-S added 2011-03-02. Last modified 2020-02-02. |
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