The BMW Z4 M Roadster is a 2 door convertible/cabriolet style road car with a front mounted engine powering the rear wheels.
The Z4 M Roadster is part of BMW's E85 series of cars.
Its engine is a naturally aspirated petrol, 3.2 litre, double overhead camshaft 6 cylinder with 4 valves per cylinder. This unit has an output of 338 bhp (343 PS/252 kW) of power at 7900 rpm, and maximum torque of 365 N·m (269 lb·ft/37.2 kgm) at 4900 rpm.
The engine transmits power to the wheels compliments of a 6 speed manual transmission.
The stated kerb weight is 1485 kg.
Maximum stated speed is 250 km/h, which equates to 155 mph, manufacturer claimed fuel consumption is 18.2/8.6/12.1 l/100km urban/extra-urban/combined, and carbon dioxide emissions are 292.0 g/km.
Full specs
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| bodywork | |||
|---|---|---|---|
| Body type | 2 seater convertible/cabriolet | ||
| Number of doors | 2 | ||
| Designer | |||
| dimensions & weights | |||
| Wheelbase | 2497 mm | 98.3 inches | |
| Track/tread (front) | 1486 mm | 58.5 inches | |
| Track/tread (rear) | 1516 mm | 59.7 inches | |
| Length | 4113 mm | 161.9 inches | |
| Width | 1781 mm | 70.1 inches | |
| Height | 1302 mm | 51.3 inches | |
| Ground clearance | |||
| length:wheelbase ratio | 1.65 | ||
| Kerb weight | 1485 kg | 3274 lb | |
| Weight distribution | |||
| fuel tank capacity | |||
| aerodynamics | |||
| Drag coefficient | 0.37 | ||
| Frontal area | 1.92 m² | ||
| CdA | 0.71 | ||
| Powertrain | |||
| engine type | naturally aspirated petrol | ||
| Engine manufacturer | BMW | ||
| Engine code | S54B32 | ||
| Cylinders | Straight 6 | ||
| Capacity | 3.2 litre 3246 cc (198.083 cu in) |
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| Bore × Stroke | 87 × 91 mm
3.43 × 3.58 in |
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| Bore/stroke ratio | 0.96 | ||
| Valve gear | double overhead camshaft (DOHC)
4 valves per cylinder 24 valves in total |
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| maximum power output | 343 PS (338 bhp) (252 kW) at 7900 rpm |
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| maximum torque | 365 Nm (269 ft·lb) (37.2 kgm) at 4900 rpm |
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| Specific output | 77.6 kW/litre 105.6 ps/litre 104.1 bhp/litre 1.71 bhp/cu in |
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| Specific torque |
112.45 Nm/litre
1.36 ft·lb/cu3 |
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| Engine construction | |||
| Lubrication | wet sumped | ||
| compression ratio | 11.5:1 | ||
| Fuel system | |||
| bmep (brake mean effective pressure) | 1413 kPa (204.9 psi) | ||
| Maximum RPM | |||
| crankshaft bearings | |||
| Engine coolant | Water | ||
| Unitary capacity | 541 cc | ||
| Aspiration | Normal | ||
| Compressor | N/A | ||
| Intercooler | None | ||
| Catalytic converter | Y | ||
| performance | |||
| Acceleration 0-80km/h (50mph) | |||
| Acceleration 0-60mph | |||
| Acceleration 0-100km/h | 5 s | ||
| Acceleration 0-160km/h (100mph) | |||
| Standing quarter-mile | |||
| Standing kilometre | |||
| Maximum speed | 250 km/h (155 mph) | ||
| Power-to-weight ratio | Higher is better 230.77 PS/tonne (1000 kg) 0.23 PS/kg 169.73 kW/tonne (1000 kg) 0.17 kW/kg 227.61 bhp/tonne (1000 kg) 0.23 bhp/kg 0.1 bhp/lb |
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| Weight-to-power ratio | Lower is better 5.89 kg/kW 9.84 lb/bhp |
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| fuel consumption | |||
| Fuel consumption | 18.2/8.6/12.1 l/100km urban/extra-urban/combined | ||
| universal fuel consumption (calculated from the above) | |||
| litres/100km | 18.2/8.6/12.1 l/100km urban/extra-urban/combined | ||
| km/litre | 5.5/11.6/8.3 km/l urban/extra-urban/combined | ||
| UK MPG | 15.5/32.8/23.3 UK MPG urban/extra-urban/combined | ||
| US MPG | 12.9/27.4/19.4 US MPG urban/extra-urban/combined | ||
| Carbon dioxide emissions | 292.0 g/km NEDC | ||
| Carfolio Calculated CO2 ? | |||
| VED band (UK) | M | ||
| CO2 Effizienz (DE) | |||
| chassis | |||
| Engine position | front | ||
| Engine layout | longitudinal | ||
| Drive wheels | rear wheel drive | ||
| Torque split | N/A | ||
| Steering | |||
| turns lock-to-lock | |||
| Turning circle | |||
| Front suspension | |||
| Rear suspension | |||
| Wheel size front | 8J x 18 EH2 IS42 LM | ||
| Wheel size rear | 9J x 18 EH2 IS30 LM | ||
| Tyres front | 225/45 ZR 18 | ||
| Tyres rear | 255/40 ZR 18 | ||
| Brakes F/R | VeDi/VeDi-S-ABS | ||
| Front brake diameter | 345 mm | ||
| Rear brake diameter | 328 mm | ||
| Braked area | |||
| Gearbox | 6 speed manual | ||
| Top gear ratio | 0.85 | ||
| Final drive ratio | 3.62 | ||
| general | |||
| Carfolio.com ID | 133694 | ||
| Production total | |||
| Model code | |||
| Model family | E85 | ||
| RAC rating | 28.2 | ||
| Insurance classification | No information available | ||
| Tax band | No information available | ||
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2005 BMW Z4 M Roadster added 2005-10-25. Last modified 2013-02-28. |
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