BMW Z4 M E85
Extending BMW's roadster family right at the top, the Z4 M Roadster takes up and continues the brand's tradition in a segment originally created back in 1997. The BMW Z3 M Roadster marked the world's first high-performance production roadster, with more than 15,000 units being sold to customers by the year 2002, making the Z3 M Roadster the best seller in its class and the absolute leader in dynamic performance, agility, and sportiness.
|2006 BMW Z4 M E85 Roadster|
Z4 M Roadster
S54 B32 Kat
252kW | 343HP
250km/h | 155mph
|Fuel Consumption (l/100km | mpg)|
18.2 | 12.9
8.6 | 27.3
12.1 | 19.4
Source for technical specifications: BMW.com.
The Z4 M Roadster: Awe-Inspiring Performance in Every Respect.
Boasting BMW M's straight-six power unit, the Z4 M Roadster features a high-performance engine unparalleled in the roadster
market: In 2005 this unique engine received the "Engine of the Year Award" acknowledged and highly respected the world
over for the fifth time in a row, setting up a record never seen before. Through its high-speed concept and virtually optimum
transmission ratios, this outstanding power unit generates enormous thrust and performance in all speed ranges. Its specifications
alone are very impressive: six cylinders, 3,246cc, 252kW/343hp at 7,900rpm, 365Newton-metres/269 lb-ft at 4,900 rpm, maximum
engine speed 8,000rpm.
Two other figures perhaps say even more about the engine's outstanding performance: Output per litre is 106hp and the power-to-weight ratio is 4.1 kilos/hp. On the road this means acceleration to 100 km/h in 5.0 seconds, with the same short time of 5.0 seconds being required for intermediate acceleration in fourth gear from 80-120 km/h (50-75 mph). Top speed is limited electronically to 250 km/h or 155 mph.
The Joy of Shifting Gears Six Times Over.
The high-speed engine concept is simply ideal for a sports car in combination with a short overall transmission ratio, since this allows the conversion of engine power into optimum thrust on the rear wheels. And combining the M final drive with a six-speed manual gearbox, the engineers at BMW M are able to fulfil this requirement to the highest standard. Short and crisp shift travel, supreme running smoothness, and precise guidance of the shift lever with sensitive feedback ensuring that the gear is properly in mesh, are typical fortes of this transmission.
So leaving aside just a few components, the new BMW M3 is a brand-new car from the ground up. The aesthetic design of the body again typical of BMW M and the drivetrain technology conceived from the start for supreme performance – clear proof of the competence of the car development engineers at BMW M GmbH with their close ties to motorsport – spell out supremacy of the highest standard. In a nutshell, therefore, the new BMW M3 is a car built to be a winner, a car always able to prove its superiority also in everyday traffic.
Variable M Differential Lock for Supreme Power in Bends.
The Z4 M Roadster comes with the speed-sensitive variable M differential lock already well-known and greatly admired on the M3. This special feature gives the car both superior driving stability and optimum traction especially when accelerating out of a bend. Allowing a very sporting style of motoring, especially on roads with a higher frictional coefficient, the M differential lock enables the experienced driver to enhance the positive features of rear-wheel drive to an even higher standard. Under challenging conditions such as a different frictional coefficient on each side of the car typical of winter weather and road surfaces, the system gives the Z4 M Roadster supreme traction and stability.
The Z4 M Roadster: Ultimate Driving Pleasure of the Highest Standard.
The chassis and suspension of the Z4 M Roadster is a consistent enhancement upgrading the suspension of the Z4 Roadster to an even higher standard. The entire system therefore offers even greater driving pleasure, without in any way impairing the car's everyday driving qualities and comfort.
New DSC Setting the Standard in Suspension Control.
Reflecting BMW's consistent philosophy, the chassis and suspension control systems on the Z4 Roadster and the Z4 M Roadster do not serve to upgrade the suspension as such - simply because the suspension already offers a very high standard - but rather to help the driver master critical situations when driving to the limit. And indeed, the safety reserves offered by BMW's roadsters are already very substantial to begin with. But this does not stop BMW from offering new, supplementary functions such as Hill Start Assistance, Dry Braking, etc.
Using the integrated Dynamic Traction Control (DTC) function on the BMW Z4 Roadster, the driver is able at the touch of a button to improve traction and, accordingly, the drive power actually conveyed to the road on slippery surfaces such as snow. He is also able to adjust the driving behaviour of the BMW Z4 to higher dynamic requirements, thus capitalising on the sporting qualities of the car. One example is that DTC allows greater slip on the rear wheels whenever appropriate.
Numerous Interesting Ancillary Functions.
BMW's new DSC Dynamic Stability Control offers a number of additional functions: Start-Off Assistance on uphill gradients, for example, automatically operates the brakes for a short period, preventing the car from rolling back on an uphill gradient and thus no longer requiring the driver to pull the handbrake when setting off.
Safety is further enhanced by automatic Fading Compensation as well as the Brake Standby function automatically pre-loading the brake linings. Automatic Dry Braking of the brake discs on wet roads, in turn, serve to improve brake response when needed.
The Z4 M Roadster incorporates BMW's variable M differential lock in combination with a special configuration of the DSC dynamic control system.
Cutting-Edge Precision when Steering.
The steering system in the Z4 M Roadster, is supported by hydraulic power assistance. This ensures unparalleled steering manoeuvres in terms of overall precision and optimum feedback of all driving conditions. The overall steering transmission ratio is 47 : 1, allowing even faster steering control and operation and thus offering benefits in terms of supreme driving dynamics.
Compound High-Performance Brakes Keeping M Power under Control.
With its even higher standard of performance, the Z4 M Roadster features BMW M's floating compound high-performance brake system originally conceived for the BMW M3 CSL as a system carried over directly from motorsport. This superior brake system ensures stopping power of the highest standard, giving the Z4 M Roadster a stopping distance of just 34 metres or 112 feet from a speed of 100 km/h.
Z4 M Roadster: High Performance at Very First Sight.
Clearly recognisable as a Z4 Roadster, the Z4 M Roadster visualises its superior character of high performance even more convincingly. The functional and technical qualities of the car are reflected directly and authentically by the design of the Z4 M Roadster, numerous details both outside and inside distinguishing it from the "basic" model.
The most conspicuous highlights are the front air dam with its X-shaped combination of lines and openings, the large air intake scoops, as well as the low-slung kidney grille and the two striking precision lines on the engine compartment lid. A feature exclusive to the Z4 M Roadster is the double-spoke design of the 18-inch aluminium rims. And last but certainly not least, the rear end also comes in that typical M style, with four striking tailpipes and a horizontal diffuser.
The Interior: Sporting and Functional All in One.
Inside, the new BMW Z4 M Roadster boasts a sporting, purist but at the same time exclusive look throughout. Clear shapes and the very best materials give the interior its particular touch, powerfully emphasising the thrill of sports motoring.
The BMW M colours are also to be found on the speedometer and rev counter with their face finished in black and boasting both white numbers and red indicator needles accentuated by permanent white illumination.
Yet another unique feature is the engine speed band presented in the rev counter like in the other BMW M cars: The yellow pre-warning field and the red warning field limit the permissible range of engine speed as a function of current engine oil temperature. With the temperature of the oil in the engine increasing, the useful speed range increases accordingly, making it easier for the driver to intuitively monitor the current temperature level.
The steering wheel, gearshift lever knob and door entry strips are further features specific to BMW M, just like the air conditioning and fresh air adjusters, the door openers and door closing handles galvanically upgraded in pearl gloss chrome.
Three exterior colours exclusive to BMW M and five special paintwork colours for the BMW Z4 Roadster enable the customer to give his - or her - Z4 M Roadster a very special personal touch. Within the interior, no less than four different colours, two leather trim options with a varying degree of leather finish, as well as three exclusive trim surfaces add to the high degree of individual style.
Source: BMW Group