The new BMW Z4 M Roadster. The new BMW Z4 Roadster.

1. The new BMW Z4 Roadster. The new BMW Z4 M Roadster. (Short Version) 4
2. Design of the BMW Z4 Roadster: Even More Fun in a New Outfit. 13 3.
Drivetrain of the BMW Z4 Roadster: Even More Power and Efficiency. 18 4.
Chassis and Suspension of the BMW Z4 Roadster: Ultimate Driving
Pleasure. 24 5. Bodyshell and Passive Safety of the BMW Z4 Roadster:
Light and Incredibly Safe. 29 6. Features and Equipment of the BMW Z4
Roadster: Purist and Authentic. 32 7. Design of the new BMW Z4 M
Roadster: The Ultimate in Open-Air Motoring. 37 8. Drivetrain of the new
BMW Z4 M Roadster: The Passion of Power. 41 9. Chassis and Suspension of
the new BMW Z4 M Roadster: Driving Pleasure at the Limit. 47
10.Bodyshell of the new BMW Z4 M Roadster: Light and Safe. 54
11.Features and Equipment of the new BMW Z4 M Roadster: Focusing on the
Road. 56 12.Production of the BMW Z4 Roadster: Highly Flexible to Meet
the Customer's Individual Requirements. 61 13.Positioning of the BMW
Z4/Z4 M Roadsters: How Similar Customers Can Be. 64 14.The History of
the BMW Roadster. 66 15.The BMW Z4/BMW Z4 M Roadster. Specifications. 73
16.Exterior and Interior Dimensions. 75 17.Output and Torque Diagrams.
77 1.The new BMW Z4 Roadster. The new BMW Z4 M Roadster. (Short
Version) More than any other sports car in the world, this unique car
embodies the typical roadster: The BMW Z4 Roadster thrills the car
world through its fascinating, sporting dynamism created by a perfect
synthesis of a high-performance power unit, the outstanding chassis and
suspension, and in¬novative features all round. And not least it is
the wonderful design of the BMW Z4 Roadster which makes this car so
unique, desirable and a genuine must-have. And now, four years after
its world debut, the BMW Z4 Roadster is making a new, brilliant
appearance with new engines. Marking another highlight on the same
occasion, the only purist high-performance roadster in the world is
making its world debut at the Detroit Auto Show in Detroit in January
2006: The upcoming BMW Z4 M Roadster is the high-performance
ultra-sports version of the Z4 Roadster so many cus¬tomers have
been waiting for. Extending BMW's roadster family right at the top,
this unique car takes up and continues the brand's tradition in a
seg¬ment originally created by BMW M in the first place: 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. 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 im¬press¬ive:
six cylinders, 3,246 cc, 252 kW/343 hp at 7,900 rpm, 365
Newton-metres/269 lb-ft at 4,900 rpm, maximum engine speed 8,000 rpm.
Two other figures perhaps say even more about the engine's outstanding
performance: Output per litre is 106 hp 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 combina¬tion 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 typi¬cal fortes of this transmission. 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. New
Six-Cylinder Power Units for the Z4 Roadster. While the six- and
four-cylinder power units featured in the BMW Z4 Road¬ster
naturally cannot match the output and performance of the M engine, they
are everything but under-powered. Indeed, the new 3.0-litre straight-six
in the BMW Z4 Roadster 3.0si is currently the most innovative engine in
its class, setting the standard in motoring refinement and dynamic
perform¬ance. Further strengths are the engine's high output per
litre, a very good power- to-weight ratio, and the lowest specific fuel
consumption. Maximum output is 195 kW/265 hp at 6,600 rpm, maximum
engine speed is 7,000 rpm, and the engine develops its peak torque of
315 Newton-metres or 232 lb-ft at 2,750 rpm. Complying, last but not
least, with both the EU4 and ULEV II standards, this outstanding power
unit is also a role model from the perspective of the environment. The
most striking feature from the customer's perspective in comparison with
the former engine is the sporting responsiveness of the new power unit
in conjunction with thrilling engine sound whenever the driver calls up
its power, as well as supreme refinement and motoring culture when
cruising or just breezing along. Superior power and low weight
naturally also mean superior performance and efficiency: The Z4
Roadster 3.0si accelerates from 0 to 100 km/h in 5.7 seconds,
acceleration from 80 to 120 km/h (50-75 mph) in fourth gear comes in
5.5 seconds. Like the Z4 M Roadster, the Z4 Roadster 3.0si is limited
electronically to a top speed of 250 or 155 mph. Fuel consumption in
the combined EU cycle, finally, is just 8.6 litres Premium plus/100 km,
equal to 32.8 mpg Imp. Everything but Mediocre: the two 2.5-Litre
Six-Cylinders. Two 2.5-litre power units round off the range of
six-cylinders: The BMW Z4 Roadster 2.5si, developing maximum output of
160 kW/218 hp, is among the top performers in its segment. Peak torque
of 250 Newton-metres or 184 lb-ft is maintained consistently between
2,900 and 4,250 rpm, accelerating the Z4 Roadster 2.5si from 0-100 km/h
in a mere 6.5 seconds. Equally su¬perior torque and muscle is borne
out by the car's acceleration from 80-120 km/h in fourth gear likewise
in 6.5 seconds. Top speed is 240 km/h or 149 mph, standard fuel
consumption is 8.4 litres Premium plus/100 km, equal to 33.6 mpg Imp.
And again it goes without saying that the Z4 Roadster 2.5si
com¬plies in full with both the EU4 and ULEV II emission standards.
In another version also boasting a 2.5-litre power unit, the Z4 Roadster
2.5i comes with maximum output of 130 kW/177 hp and peak torque of 230
Newton-metres or 169 lb-ft, replacing the former BMW Z4 Roadster 2.2i.
The big benefit for the customer offered by the larger engine is the
extra power and torque, a significant advantage above all when
accelerating from low speeds. The performance data: 0-100 km/h in 7.1
seconds, acceleration from 80-120 km/h (50-75 mph) in 4th gear in 7.0
seconds. Top speed is 229 km/h or 142 mph, fuel consumption 8.2 litres
premium plus on 100 kilometres (equal to 34.5 mpg Imp), and naturally
this model also complies in full with the EU4 and ULEV II emission
standards. All of these straight-six power units offer the customer
best-in-class per¬formance and excellent running smoothness in
typical BMW style. They come with a composite aluminium/magnesium
crankcase, a bedplate struc¬ture, and the cylinder head made of
magnesium, fully variable VALVE¬TRON¬IC valve control, infinite
double-VANOS camshaft adjustment, and four-valve technology. BMW Z4
Roadster 2.0i - Entering the World of Real Roadster Motoring. The
2.0-litre four-cylinder power unit featured in the BMW Z4 Roadster 2.0i
rounds off the range of engines in this unique family of roadster.
Developing 110 kW/150 hp at 6,200 rpm and maximum torque of 200
Newton-metres or 147 lb-ft at 3,600 rpm, this straight-four also
guarantees superior dynamics and undiluted roadster pleasure:
Acceleration to 100 km/h takes just 8.2 seconds, exactly the same time
as the fast sprint from 80-100 km/h (50-75 mph) in fourth gear. Top
speed, in turn, is an equally superior 220 km/h or 136 mph. Consuming
just 7.5 litres premium plus/100 kilometres (equal to 37.7 mpg Imp),
the four-cylinder is very fuel-efficient and, complying with the EU4
and ULEV II emission standards, offers superior environmental
friendliness. The engine is also equipped with BMW's innovative
VALVETRONIC and dual-VANOS management systems. A further feature is the
DISA intake mani¬fold, a technology able to change the length of
the oscillating pipes as a function of engine load. Operating in
conjunction with the engine manage¬ment system, this technology
ensures a level of spontaneity when accele¬rating previously only
to be found in sports engines with individual throttle butterflies.
Six Gears on All Models. All new BMW Z4 Roadsters come with a six-speed
manual gearbox. The typical strengths of this transmission are the
short and crisp gearshift travel, superior running smoothness and
precise guidance of the gearshift lever in the middle, with shift
forces remaining smooth and consistent at all times. With the six gears
coming close together with only small increments in between, and with
the large gap between the lowest and highest gear, the driver is always
able to choose the ideal gear ratio quickly and smoothly even when
driving fast and dynamically. Another BMW First: the New Sport
Automatic. Automatic transmission in the Z4 Roadster 3.0si and 2.5si
comes as a high¬light with shift paddles on the steering wheel. In
conjunction with the new set-up of the transmission, this outstanding
gearshift gives even the afici¬onade of automatic transmission a
dynamic experience of sporting perform¬ance in the Z4 Roadster
without having to forego the superior comfort of an automatic
gearshift. Supreme Body Stiffness for Four Stars in the EuroNCAP Crash
Test. Designed and built from the start as an open-air model, the body
of the BMW Z4 Roadster is also simply ideal in terms of weight and
stiffness: Of¬fering 14, 500 Nm/degree of static torsional
stiffness, this is the stiffest body¬shell in the segment. Apart
from thrilling performance and agility in bends, this also means that
the BMW Z4 Roadster achieves excellent results in the demanding EuroNCAP
crash test: Achieving four out of five possible stars, the car's result
is truly remarkable for an open-air two-seater. Indeed, in the 2004
EuroNCAP test, the Z4 Roadster scored 15.64 points for head-on
collisions and 16 points for side-on collisions out of a possible
maximum result of 16 points in each case, the best figures ever
measured on the dummies in a roadster, receiving the EuroNCAP
Best-in-Class Award. This means that in practice the Z4 Roadster
protects its occupants better than all the cars in this segment tested
so far. In fact the forces and strain acting on the car's occupants are
lower than in most cars with a fixed roof. Chassis and Suspension: a
Star in Bends. The BMW Z4 Roadster offers its driver exactly the right
chassis and sus¬pen¬sion virtually tailor-made for sports
motoring, guaranteeing sheer driving pleasure all the way to the
absolute limit. And should the driver ever be so enthusiastic that his
sheer driving pleasure reaches the limits to physical stability,
sophisticated control systems still guarantee active safety of the
highest standard. The chassis and suspension are designed in terms of
their spring and damper action, as well as kinematics and
elastokinematics, for superior dynamism, agility and handling. This
makes the BMW Z4 Roadster in all its variants most probably the most
agile and dynamic roadster in the world. For even more sporting
behaviour, the genuine enthusiast moreover has the choice of a sports
suspension lowering the entire car by 15 millimetres or 0.59''. The
runflat tyres featured as standard are specially matched to the sporting
character of the BMW Z4 Roadster and now offer somewhat more comfortable
suspension qualities without affecting the agility of the car. The Z4 M
Roadster: Ultimate Driving Pleasure of the Highest Standard. The chassis
and suspension of the Z4 M Roadster is a consistent enhance¬ment
upgrading the suspension of the Z4 Roadster to an even higher
stand¬ard. The entire system therefore offers even greater driving
pleasure, with¬out 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 up¬grade the suspension as such - simply because the
suspension already of¬fers a very high standard - but rather to
help the driver master critical situ¬ations 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,
automa¬tic¬ally 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.
Auto¬matic 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
com¬bi¬nation with a special configuration of the DSC dynamic
control system. Electric Power Steering Optimising the Steering System.
The Z4 Roadster and the Z4 M Roadster also differ in terms of their
steering system: The Z4 Roadster features BMW's electromechanical EPS
Electric Power Steering highlighting the dynamic and agile set-up of the
BMW Road¬ster. This unique system offers a very high standard of
flexibility in its steer¬ing characteristics, an optimum compromise
of the steering damping effect and feedback from the steering, as well
as low control forces at low speeds and when manoeuvring. A further
important point is the very good centering effect, with the steering
wheel returning smoothly and reliably to its zero position.
Servotronic, finally, comes as standard. Cutting-Edge Precision when
Steering. The steering system in the Z4 M Roadster, by contrast, is
supported by hy¬drau¬lic 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 15.4 : 1, allowing even faster steering control
and operation and thus offering benefits in terms of supreme driving
dynamics. Lightweight Brakes with Outstanding Performance. A new
feature is the 17-inch brake system on the Z4 Roadster 3.0i. The
particular fortes in this case are extreme stopping power, very good
resist¬ance to fading, and optimum long-term brake qualities.
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
con¬ceived for the BMW M3 CSL as a system carried over directly from
motor¬sport. 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. New Highlights in
Design. In their design, both the updated BMW Z4 Roadster and the new
Z4 M Road¬ster consistently continue the characteristic design
language of BMW's thoroughbred roadster concept: The BMW Z4 Roadster
boasts moderate updates including a modified front section drawn down
closer to the road. Other new features are the foglamps and the
reflectors so typical of the car. Benefiting from new tail lights with
integrated light conductors as well as more horizontal lines, the
modifications at the rear give the car an even wider, lower, and more
muscular appearance. Featuring even more sophis¬ticated,
top-quality materials and additional colours, the interior is truly
ex¬qui¬site in its looks without in any way foregoing its
sporting, purist character. Z4 M Roadster: High Performance at Very
First Sight. Clearly recognisable as a Z4 Roadster, the Z4 M Roadster
visualises its su¬perior 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 com¬bination 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 mate¬rials 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
count¬er 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
ad¬justers, the door openers and door closing handles galvanically
upgraded in pearl gloss chrome. Three exterior colours exclusive to
BMW M and five special paintwork col¬ours 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
de¬gree of individual style. Sufficient Space for Two. Both the BMW
Z4 Roadster and the BMW Z4 M Roadster offer a lot of space for a car of
this kind: The glove compartment, several storage boxes, as well as a
large, approximately ten-litre box in the rear bulkhead ensure a high
degree of practical value. And whenever required, the variable roof
com¬¬partment folds up to provide additional space in the
luggage compart¬ment at the rear increasing from an already
generous 240 litres or 8.4 cu ft sufficient for transporting two golf
sets to 260 litres or 9.1 cu ft - in the Z4 M Roadster from 200 (7.0 cu
ft) to 220 litres (7.7 cu ft) due to the battery housed in the luggage
compartment in this case. A Special Roof with Special Folding
Configuration. All of BMW's new Z4 Roadsters come with an extremely
compact folding roof where the front, rigid section moves down on top
of the fabric roof like a cover and locks in position flush with the
body of the car. The roof is easy to open and close with one hand; the
heated rear window is made of scratch-proof mineral glass. A fully
automatic, electrically operated roof is naturally available as an
option and comes as standard on the Z4 M Roadster, also opening and
closing from outside by remote control. Bi-Xenon Headlights for
Optimum Visibility. The BMW Z4 Roadster comes as standard with dual
halogen headlights. As an option - and as a standard feature on the Z4
Roadster 3.0si and the Z4 M Roadster - static bi-xenon headlights
ensure maximum high- and low-beam intensity. The car's position
lights are formed by two light conductor rings, this feature so
characteristic of the BMW brand now also highlighting the Roadster
series. Extra Safety Thanks to the Adaptive Brake Display. All Z4
Roadsters come as standard with BMW's two-stage Adaptive Brake Display
helping efficiently to avoid collisions from behind: Whenever the
driv¬er applies the brakes hard or with ABS intervening, the
illuminated areas in the rear lights grow larger and are intuitively
perceived by motorists fol¬low¬ing from behind as a clear sign
of an emergency braking manoeuvre. Accordingly, drivers following the
BMW will respond appropriately by ap¬plying the brakes harder in
good time and thus benefiting from extra stop¬ping distance.
Options Galore: Top-Class Audio and Navigation Systems. Apart from the
"basic" audio system, the Z4 Roadster is available with two
truly outstanding HiFi systems developed especially for this car. Two
navi¬gation systems also enable the roadster driver to benefit from
BMW's lead¬ing position in navigation technology. And the final
point is that all of these systems may be combined with virtually all
telecommunication features cur¬rently available.