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Z4 - E85 (2002 - 2008)

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Article Index
Z4 - E85 (2002 - 2008)
Drivetrain and Powerbutton
The new Z4 2.2i
Standard Specifications Z4 2.2i
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Z4 - BMW's top roadster

The BMW Z4 certainly means business: This is exactly what a BMW roadster must look like, this is exactly how it must drive. The Z4 is a breathtaking experience on the road appealing to all your senses as a purist automobile for the connoisseur. It not only represents one side of BMW’s new design language, but also sets new roadster standards in many areas: Self-confident, powerful, sporting and aesthetic, the Z4 offers extremely precise and safe handling ensuring driving pleasure of the most supreme calibre beyond comparison in the market.
BMW’s new two-seater is making its debut as the Z4 3.0i with a 170 kW/231 bhp powerful straight-six and six-speed manual gearbox and as the Z4 2.5i featuring a 141 kW/192 bhp straight-six combined with a five-speed manual gearbox. Both models will be entering the US market in autumn 2002, arriving in Europe in spring 2003.

Design: unique proportions in an interplay of different shapes.
Through its proportions alone, the Z4 is a truly remarkable car: The long, sleek and stretched-out engine compartment, the snug cockpit wrapped around the driver and passenger, and the short, muscular rear end – there is hardly any other roadster these days with comparable dimensions. Wheelbase measuring 2,495 millimetres or 98.2 inches and overall width of 1,781 millimetres or 70.1 inches set a new standard in this class, while the overall length of 4,091 millimetres or 161.1 inches is both sporting and compact. The result is a genuine athlete resting firmly on the road with short overhangs front and rear and without one single gram of fat.

The Z4 has two waistlines. The lower waistline extends from the engine compartment lid across the door, first moving down and then up again towards the rear. This creates an impression of powerful self-confidence and at the same time is reminiscent of the classic, door-less roadster of the past, giving this two-seater its unmistakable character. The upper waistline, by contrast, extends in a powerful arch from the beginning of the compartment lid all the way to the rear. And the door line extending upwards to the rear at a slight angle is equally exciting and fascinating in its look.

This design is truly unique: Particularly striking features are the surfaces, edges, rounded corners and drawn-in areas plastically visible and interacting among themselves, creating a rapid interplay of concave and convex design. The result is exceptional lines, shadows and reflections again emphasizing the particular proportions of the BMW Z4.

The roof has a special folding mechanism.
The Z4 is the first open-air BMW to feature a folding roof with a special folding mechanism. This folding mechanism takes up very little space and allows the frontmost part of the roof to extend like a cover over the soft top, merging flush with the body of the car. As a result, the Z4 requires neither a tonneau
cover nor a roof lid. And as an option BMW’s new two-seater is available as the only roadster in the world with fully automatic operation of the roof.

The drivetrain: prize-winning six-cylinders.
The Z4 is entering the market with prize-winning power units, BMW’s straight-six once again winning the highest awards this year in international engine contests. Appropriately, this two-seater comes with the two top-of-the-range engines, the 2.5-litre developing maximum output of 141 kW/192 bhp at
6,000 rpm and the 3.0-litre offering maximum output of 170 kW/231 bhp at 5,900 rpm. On the road this means performance justifying the term sports car in every respect: Acceleration from 0–100 km/h comes in 7.0 and, respectively, 5.9 seconds, top speed is 235 km/h (146 mph) and, respectively, 250 km/h (155 mph).

The power button: DDC Dynamic Drive Control.
The BMW Z4 comes with a very special button for the particularly dedicated driver, giving the engine even more “kick” at the command of the driver: Available as an optional extra, DDC Dynamic Drive Control calls up maximum engine power even earlier than usual in the Sports mode, engine management following an even more dynamic and sporting gas pedal control line. To reflect this enhanced response of the engine, the steering also becomes even more direct and sporting, speed-related servo assistance offered by the Electric Power Steering (EPS) following an even more sporting and dynamic control map. And if the car is fitted with SMG or automatic transmission as an option, DDC revs up the gears even higher and makes the gearshift even faster.

New: EPS Electric Power Steering.
The Z4 is the first BMW with electric instead of hydraulic power steering.
With the steering being controlled by software, EPS offers a much higher standard of flexibility in its steering characteristics and ensures optimum harmony of the steering damper effect and feedback to the driver. Contrary to conventional hydraulic steering, EPS has the further advantage of not requiring any energy when driving straight ahead without any movement of the steering wheel. In practice, this saves up to one litre on every 400 kilometres or 250 miles as compared with conventional hydraulic steering.


Drivers of the Z4 will naturally feel safe, cosseted in a cockpit with high waistlines and permanent rollover protection. Moreover, both active and passive safety is of primary concern on all BMWs and occupant protection is assured in the Z4 thanks to the Advanced Safety Electronics system. This features a control module linked to satellite sensors located in the left and right B pillars, which detect the nature of any impact and activate relevant airbags should they be required. The module also deactivates the fuel pump and alternator as well as breaking the safety terminal on the battery, reducing the risk of fire.

The new BMW Z4 2.2i
BMW's latest addition to its highly respected roadster pedigree, the Z4, has become more accessible with the addition of the new 2.2-litre model to the current 2.5i and 3.0i line up. Following the Z4's June UK debut, production of the third Z4 roadster variant started in October 2003, priced at £24,255 on-the road.

The familiar straight-six, 2.2-litre engine from the 3 and 5 Series ranges lies under the bonnet, powering the Z4 2.2i from rest to 62 mph in 7.7 seconds. With the engine also developing 210 Nm of torque at 3,500 rpm, the car is no slouch on twisting, mountainous roads or the highway. The car is capable of a wind-in-the-hair top speed of 140 mph.
Developing maximum power output of 170 bhp at 6,100 rpm, its engine is controlled by a drive-by-wire throttle butterfly. Engine and gearbox electronics 'know' which gear is selected and adapt the throttle butterfly response offering supreme flexibility and maximum performance whatever the circumstances.

As on the 2.5-litre model, the Z4 2.2i offers drivers a manual five-speed gearbox as standard with the option of a five-speed automatic priced at £1,350. Carried over the from the 3 Series range, the automatic gearbox includes BMW's Steptronic system with manual shift; drivers simply pull back the lever to change up and push forwards to down shift.

Chassis and Body
Using lightweight components such as an aluminium bonnet and roll bars integrated into the basic body structure, the Z4 2.2i weighs in at a svelte 1,325kgs - that's 30kgs lighter than its predecessor, the Z3 2.2i and lighter than the 2.5i and 3.0i models too.
However, the car is remarkably strong and scuttle shake is now a thing of the past. Boasting torsional rigidity of 14,500 Nm/degree, the Z4 is almost three times as stiff as its predecessor Z3 (5,600Nm/degree) an unprecedented figure for the roadster segment.

Standard Equipment
Not only is the new Z4 2.2i an exceptionally well-specified roadster, it also holds a world record - it has the fastest retracting fully automatic convertible roof on the market. One push of the button on the centre console releases latches on the windscreen surround, and the roof glides into its lowered position. In less than 10 seconds the roof is down, with the front section acting as a tonneau cover. A simple push of the button returns it to its fully closed position.
Drivers who want roof-down motoring but also need to maximise storage space will benefit from the innovative Variable Soft Top Compartment. With the roof up, an additional 20 litres of boot space is available (up from 220 to 240 litres) by collapsing the roof storage box in the boot, normally used to store the roof.

The Z4 2.2i also comes as standard with air-conditioning, single CD player, Sports seats and Sports steering wheel. Additionally, the 16" Cross Spoke alloy wheels fitted as standard on the Z4 2.2i are fitted with Run-flat tyres - which come with optional wheels across the Z4 range too. Driven carefully at 50 mph, the car can travel for up to 90 miles with one or more punctured tyres, signalling the end of road side wheel changes or the wait for breakdown assistance. In the absence of a spare wheel, the car also benefits from less weight and more boot space.

Optional Equipment
As well as high levels of standard specification, a myriad optional equipment is available for the Z4 2.2i. Five different alloy wheel options are available, from a 16" through to a Composite 18" wheel.
Creature comforts normally associated with Executive saloons are also available, with the option of Business or Professional navigation systems. The Business system is integrated into the dashboard facia, while the Professional system features an 8.8 inch (22.5cm) monitor which rises from the dashboard at the push of a button, with the screen doubling as a television where specified. All navigation systems for BMW cars now include a DVD disc that provides quick access to detailed maps covering the whole of Europe.

Drivers are able to keep in touch on the move by specifying either the Professional car telephone, or Bluetooth phone preparation. Compatible Nokia and Sony telephones can be paired with the car, where the Bluetooth wireless connection provide hands-free functionality. Additionally, Voice Control can be specified to direct a number of telephone and navigation functions without needing to remove your hands from the steering wheel.
For the ultra-hardy Z4 driver, seat heating makes roof down motoring in the winter even more comfortable.

Standard Specification in detail - Z4 2.2i
· Anti-Lock Braking System ( ABS)
· Cornering Brake Control ( CBC)
· Dynamic Stability Control ( DSC III), incl. Dynamic Traction Control ( DTC)
· Low beam in ellipsoid technology; high beam free-form headlights
· Raised 3rd brake light integrated in luggage compartment lid
· Side indicator repeaters in side panel front, with integrated BMW roundel
· Tyre Run Flat indicator
· Roll bar protection system
· Airbags for driver and front passenger, with seat occupant detector for front passenger
· Side airbags
· Remote central locking; locks doors, trunk lid, fuel tank flip, rear storage box between the backrests
· Disc brakes - front inner-vented
· Bumpers with aluminium impact absorbers
· Deformation zones at the front and rear
· Safety-belt (automatic with pyrotechnic belt latch tensioners)
· Side impact protection system
· Warning triangle
· Fog-lights

· 6-cylinder in-line engine with 4-valve technology
· Alloy engine block
· Alloy cylinder head
· Digital motor electronics ( DME)
· Double- VANOS
· Emissions Management EU3
· Ignition distribution, static
· On-board diagnosis
· Selective cylinder anti-knock control
· Three-way catalytic converter

Transmission / Suspension
· 5-speed manual transmission
· Central link-arm rear axle
· Single joint spring strut front axle
· Servotronic steering
· Anti-roll bars - front and rear
· SAC clutch (self adjusting)

Interior Equipment
· Specially contoured sports seats
· Sun visors with vanity mirror, with slide cover for driver and front passenger
· Interior trim strips in silk graphite
· Free Spirit Sensatec technical fabric upholstery
· Electric window lifts
· Storage facility between seats at rear
· Lockable glove compartment
· Storage compartments behind rear seats
· Tool bag in storage box of battery tray
· Steering wheel column adjustment, for reach and rake
· On-board computer
· Instrument cluster with circular instruments, for speed, rev counter, fuel tank level display, coolant temperature and fuel consumption display
· Velour floor mats
· Smokers package
· Automatic air-conditioning
· Radio BMW Business CD
· Tool Kit
· First Aid Kit
· Variable soft top compartment

Exterior Equipment
· Hardtop preparation
· Exterior door handles in body colour
· Fully automatic soft top operation
· Alarm system
· 16" light alloy wheels - cross spoke style 104 with 205/55 R16 tyres
· RFT (Run Flat Tyres) wheels with emergency-run characteristics through reinforced side walls and extended hump rim
· Exterior mirrors in body colour, electrically adjustable
· Aluminium bonnet hinged at the rear face, with gas spring support
· Heated rear glass window
· Heat insulated glass green, windscreen and side windows
· Luggage compartment lid unlock function by electric motor, from inside
· Front grille with vertical kidney grill bars black
· Headlights inner housing black
· Headlight surrounds
· Z4 designation on trunk lid; engine capacity front wing
· Soft top - black

Standard equipment - Z4 2.5i
(in addition to Z4 2.2i)
· 16" Star Spoke Style Alloy Wheel with 225/50 R16 tyres
· Sports steering wheel with leather rim
· Handbrake handle and gaiter in leather
· Gear lever with leather knob and gaiter
· Interior rear view mirror with anti-dazzle function
· Driving Dynamics Control (DDC)

Standard equipment - Z4 3.0i
(in addition to Z4 2.5i)
· Anthracite Chrome Line Interior
· Electric seat adjustment, with memory for driver's seat
· Headlamp Washer system
· Rain Sensor
· Automatic air conditioning
· Interior trim strips in brushed aluminium
· Oregon Leather Upholstery
· 17" light alloy wheels double spoke style 103
· Headlight surrounds in Matt Chrome
· Brake disks, rear inner-vented
· Interior light package
· M Sports Suspension
· 6-speed manual transmission
· Front arm-rest

Specifications for BMW z4 series e85

TypeBuiltPerformanceFuel consEnginePower/Torque
BMW Z4 2.0i
Z4 Series (E85)
Topspd: 220km/h
0-100km/h: 8.2s
80-120km/h*: 8.2s
City: 10.8 l/100km
Hway: 5.6 l/100km
Avg: 7.5 l/100km
Code: N46 B20
1995cc - 4cyl / 16v
110kW / 150HP at 6200rpm
200Nm at 3600rpm
BMW Z4 2.0i
Z4 Series (E85)
Topspd: 220km/h
0-100km/h: 8.2s
80-120km/h*: 8.2s
City: 10.8 l/100km
Hway: 5.6 l/100km
Avg: 7.5 l/100km
Code: N46 B20
1995cc - 4cyl / 16v
110kW / 150HP at 6200rpm
200Nm at 3600rpm
BMW Z4 2.2i
Z4 Series (E85)
Topspd: 225km/h
0-100km/h: 7.7s
80-120km/h*: 7.7s
City: 12.8 l/100km
Hway: 6.7 l/100km
Avg: 8.8 l/100km
Code: M54 B22
2171cc - 6cyl / 24v
125kW / 170HP at 6100rpm
210Nm at 3500rpm
BMW Z4 2.5i
Z4 Series (E85)
Topspd: 235km/h
0-100km/h: 7s
80-120km/h*: 6.9s
City: 12.5 l/100km
Hway: 6.9 l/100km
Avg: 8.9 l/100km
Code: M54 B25
2494cc - 6cyl / 24v
141kW / 192HP at 6000rpm
245Nm at 3500rpm
BMW Z4 2.5i
Z4 Series (E85)
Topspd: 229km/h
0-100km/h: 7.1s
80-120km/h*: 7s
City: 11.8 l/100km
Hway: 6.1 l/100km
Avg: 8.2 l/100km
Code: N52 B25 U1
2497cc - 6cyl / 24v
130kW / 177HP at 5800rpm
230Nm at 3500rpm
BMW Z4 2.5si
Z4 Series (E85)
Topspd: 240km/h
0-100km/h: 6.5s
80-120km/h*: 6.5s
City: 12 l/100km
Hway: 6.3 l/100km
Avg: 8.4 l/100km
Code: N52 B25 O1
2497cc - 6cyl / 24v
160kW / 218HP at 6500rpm
250Nm at 2750rpm
BMW Z4 3.0i
Z4 Series (E85)
Topspd: 250km/h
0-100km/h: 5.9s
80-120km/h*: 5.8s
City: 13.5 l/100km
Hway: 6.6 l/100km
Avg: 9.1 l/100km
Code: M54 B30
2979cc - 6cyl / 24v
170kW / 231HP at 5900rpm
300Nm at 3500rpm
BMW Z4 3.0si
Z4 Series (E85)
Topspd: 250km/h
0-100km/h: 5.7s
80-120km/h*: 5.5s
City: 12.6 l/100km
Hway: 6.3 l/100km
Avg: 8.6 l/100km
Code: N52 B30 O1
2996cc - 6cyl / 24v
195kW / 265HP at 6600rpm
315Nm at 2750rpm
Z4 Series (E85)
Topspd: 250km/h
0-100km/h: 5s
80-120km/h*: 5s
City: 18.2 l/100km
Hway: 8.6 l/100km
Avg: 12.1 l/100km
Code: S54 B32
3246cc - 6cyl / 24v
252kW / 343HP at 7900rpm
365Nm at 4900rpm
* elasticity 80-120km/h in 4th gear
BMW Heaven - Specification Database

Last Updated on Monday, 12 April 2010 14:38  

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