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
innovative 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 customers 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 segment 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 impressive: 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 typical 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 superior 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 complies 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
performance and excellent running smoothness in typical BMW style. They
come with a composite aluminium/magnesium crankcase, a bedplate
structure, and the cylinder head made of magnesium, fully variable
VALVETRONIC 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 manifold, a technology able to change the length of the
oscillating pipes as a function of engine load. Operating in
conjunction with the engine management system, this technology ensures
a level of spontaneity when accelerating 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 highlight
with shift paddles on the steering wheel. In conjunction with the new
set-up of the transmission, this outstanding gearshift gives even the
aficionade of automatic transmission a dynamic experience of sporting
performance 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: Offering 14, 500 Nm/degree of static
torsional stiffness, this is the stiffest bodyshell 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 suspension 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 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. 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 Roadster. This unique system offers a very
high standard of flexibility in its steering 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 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 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
resistance 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 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. New Highlights in Design.
In their design, both the updated BMW Z4 Roadster and the new Z4 M
Roadster 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 sophisticated, top-quality materials
and additional colours, the interior is truly exquisite 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 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 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 degree
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 compartment
folds up to provide additional space in the luggage compartment 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 driver applies the brakes hard or with ABS intervening, the
illuminated areas in the rear lights grow larger and are intuitively
perceived by motorists following from behind as a clear sign of an
emergency braking manoeuvre. Accordingly, drivers following the BMW
will respond appropriately by applying the brakes harder in good time
and thus benefiting from extra stopping 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 navigation systems
also enable the roadster driver to benefit from BMW's leading position
in navigation technology. And the final point is that all of these
systems may be combined with virtually all telecommunication features
currently available.