Monday, December 15, 2008
2009 BMW Z4
The classic roadster is back – more powerful and more stylish than ever before. It is the BMW Z4, the only car in its segment combining classic roadster proportions with a seating position moved close to the rear axle, rear-wheel drive, with a retractable hardtop.
The new BMW Z4 offers all the driving pleasure of a BMW Roadster with particularly refined and stylish flair. Driving with the roof down, this two-seater offers a refreshingly intense experience of the sunshine and the wind rushing by – and driving with the hardtop closed it provides all the comfort of a sporting coupe in the premium segment. So through this diversity and wide range of qualities, the new BMW Z4 is the re-birth of the roadster.
The contoured surface to the left and right of the steering wheel incorporates the controls for the lights and air conditioning. These elements are available trimmed in Satin Silver matte, Brushed Aluminum, and Ash Grain Wood, the respective color and trim variant also being used on the center console and door handle.
The standard seats with integrated headrests on the BMW Z4 sDrive35i feature high-quality Kansas leather in a choice of three colors. A fourth choice, Ivory White Nappa leather, is also available as part of the Exclusive Ivory White Leather Package, which includes sport seats and Anthracite wood trim.
An Extended Leather option (Z4 sDrive35i only) adds leather on the upper section of the instrument panel, the doorsills, the sun visors in Black leather as well as the leather-finish door closing handles in upholstery color on the passenger’s side.
The entire range of paintwork colors available on the new BMW Z4 is made up of no less than nine color tones including Orion Silver metallic exclusive to the new Roadster.
the retractable hardtop
The new BMW Z4 is the first BMW roadster to protect its occupants from wind and weather with a fully retractable hardtop. This two-piece lightweight aluminum shell opens and closes at the touch of a button within 20 seconds. The compact packaging of the folding roof enables the Z4 Roadster to retain the characteristic, slender proportions of its predecessor.
This innovative roof system offers outstanding acoustic and aerodynamic qualities and sets a new standard in the Z4’s segment. Large windows and the high-quality roof lining give the hardtop a light look. Driver and passenger enjoy a bright ambience, generous space, and optimum visibility. Compared with the former model, the side windows are 40% larger, the see-through area in the rear window 52% larger, and all-round visibility increased14% over the previous generation.
The glass rear window in the hardtop is equipped with an electric defroster and the four side windows of the new BMW Z4 may be lowered individually. The higher roofline and larger door openings allow easier and more convenient access with the roof closed.
The retractable roof may be operated either by a switch in the center console or by remote control key fob when equipped with optional Comfort Access. Comfort Access also allows convenient loading and unloading of the luggage compartment with the roof open. To provide access to the luggage compartment in this case, the open hardtop is moved to an interim position facilitating the removal of large objects.
The most dynamic version of the new Z4 comes with the world’s first inline-6 engine to feature twin turbochargers, High Precision Injection, and an all-aluminum crankcase.
The use of two turbochargers (each supplying three cylinders) ensures responsiveness never seen before on a turbocharged engine. The engine achieves peak torque of 300 lb-ft without the slightest delay, and maintains this high level of torque throughout a broad rev range from 1,400–5,000 rpm.
Maximum output of 300 hp comes at 5,800 rpm, and the BMW Z4 sDrive35i accelerates to 60 mph in just 5.1 seconds (optional seven-speed double clutch sport automatic transmission in 5.0 seconds). The acceleration continues all the way to an electronically-limited 130 mph (150 mph when equipped with the optional Sport Package).
High Precision Injection is a key element in the Z4’s efficient performance. Injecting fuel directly into the combustion chamber offers a cooling effect allowing a higher compression ratio and optimized combustion efficiency. This second generation of direct gasoline injection developed by BMW ensures significant benefits in fuel efficiency without restricting the dynamic qualities of the engine.
The 6-cylinder normally aspirated engine:
powerful and light thanks to magnesium.
Offering spontaneous power and performance, excellent motoring refinement and outstanding efficiency, the 6-cylinder naturally-aspirated engine in the BMW Z4 sDrive30i again offers the very best in its segment. Weighing just 355 lb thanks to its composite magnesium/aluminum crankcase, cylinder head cover made of a special synthetic material and lightweight camshafts with aluminum VANOS control unit, is exceptionally light.
While BMW’s VALVETRONIC engine management controls valve stroke on the intake valves, double-VANOS varies the angle of the intake and outlet valves in an infinite process. This allows particularly efficient use of fuel, providing a “beefy” torque curve and giving the engine instant response.
The engine in the BMW Z4 sDrive30i develops maximum output of 255 hp from 3.0 liters capacity at an engine speed of 6,600 rpm. Maximum torque of 220 lb-ft, in turn, comes at just 2,600 rpm.
With this kind of power, the BMW Z4 sDrive30i accelerates from a standstill to 60 mph in 5.6 seconds (with optional sport automatic in 6.0 seconds). Top speed is electronically limited to 130 mph (150 mph when equipped with the optional Sport Package).
6-speed transmission with short gearshift travel featured as standard.
All variants of the new BMW Z4 come as standard with a 6-speed manual gearbox. Developed specifically for BMW’s new Roadster, the various transmission options are particularly sporting in their character. Indeed, this is borne out in particular by extremely short gearshift travel much shorter than on all other current BMW models with a manual gearshift.
Optional: 7-speed sport automatic with double clutch and 6-speed sport automatic with paddle shifters.
As an option, the BMW Z4 sDrive35i is available with BMW’s newly developed double-clutch sport automatic gearbox. Based on the M DCT transmission introduced in the BMW M3, this 7-speed gearbox ensures faster acceleration and extra performance in comparison with the 6-speed manual gearbox, while providing the comfort features of a BMW automatic transmission. The 7-speed double-clutch sport automatic shifts gears without the slightest interruption of power.
The BMW Z4 sDrive35i with its seven-speed sport automatic accelerates to 60mph in just 5.0 seconds, while fuel consumption is expected to outperform the fuel economy on the same model with a manual gearbox.
Sport automatic gives the driver the choice of either automatic (Program D) or manual gear selection. If desired, the driver may shift gears manually by means of paddles on the steering wheel.
The 6-speed sport automatic transmission available on the BMW Z4 sDrive30i promotes not only driving comfort, but also the sporty performance of a BMW Roadster. Indeed, the characteristics of the car are attributable to the direct connection linking the transmission to the engine, based on modern torque converter technology with an integrated torsion damper, avoiding unnecessary slip and therefore helping to eliminate any loss of power and performance. Even the slightest movement of the gas pedal, therefore, is converted spontaneously into a quick response with gearshift times reduced to a minimum.
The sport automatic transmission offers the driver the opportunity to shift gears manually when desired. Apart from selecting gears via the selector lever on the center console, the driver also has the option to use the gearshift paddles on the steering wheel.
Adaptive M Suspension featuring Electronic Damping Control (EDC).
The agility of the BMW Roadster may be further enhanced by ordering the optional Sport Package featuring Adaptive M Suspension with Electronic Damping Control. A central control unit varies the “compression” and “rebound” stages on the four twin-sleeve gas pressure dampers to provide optimum response at all times. The response time is so fast that a signal coming from a front wheel crossing a hole in the road reaches and re-adjusts the rear dampers even before the rear wheels reach the same uneven road surface.
Comfort and sportiness in one: Dynamic Drive Control.
Dynamic Drive Control allows the driver of the new Z4 to choose the drive characteristics of the car. In addition to changing damper forces on the Adaptive M Suspension, DDC also conditions the responses of the gas pedal, the power steering, and the response thresholds of Dynamic Stability Control. And if the car is fitted with either sport automatic transmission, the adaptive gearshift logarithms are adjusted.
The driver operates Dynamic Drive Control via a button on the center console next to the gear selector. By pressing the button, s/he is able to choose from the NORMAL, SPORT and SPORT+ modes, thus activating a pre-configured, perfectly balanced set-up. The SPORT mode, for example, offers more-direct steering behavior and a more-direct response to the gas pedal. The SPORT+ mode, in turn, serves additionally to activate the Dynamic Traction Control mode of DSC, intentionally allowing slight wheelspin and thus enabling the driver to take a bend in a controlled drift.
Top-end audio and communication systems.
The audio systems available in the new BMW Z4 set standards in the segment in every respect.
The CD player fitted as regular series equipment also serves to play music files in the MP3 format. The available premium hi-fi system comes with up to 14 loudspeakers and two additional subwoofers for an intense and precise experience in sound, with amplifier output of up to 650 watts. A standard AUX-In port is provided, allowing the integration of various external MP3 player. A 6-disc CD/DVD changer in the glove compartment is also available.
A Bluetooth interface is available in conjunction with optional BMW Assist to offer greater safety and convenience for making telephone calls while driving. To fully integrate the latest smartphones in the car, the new BMW Z4 is also available with a smart phone integration option.