|2-door coupe, production car
|Miles Per Gallon:
|255 bhp @ 6600 rpm
|220 lb-ft @ 2750 rpm
|f: 58.0 / r: 60.0 in
|--.- sec @ --- mph
|155 mph (limited)
|Braking, 60-0 mph:
|Nürburgring Lap Time:
In 2003, BMW launched an all-new 2-seater sports car, the Z4 Roadster. The Z4 lineup offered a pair of models, each powered by a version of BMW’s famously smooth and sonorous inline 6-cylinder engine. Firmly planted suspension, standard run-flat performance tires and state-of-the-art stability electronics were anchored in a remarkably rigid Roadster body/chassis structure; all of this was clothed in a unique and captivating look. Inside, the driver could enjoy the Z4’s innate sportiness while also savoring extensive comfort and convenience features as well as innovative design and materials.
For the 2006 model year, the Z4 acquired a new family member: the Z4 Coupe 3.0si. As the Series‘ first closed-body model, the new Coupe encloses its two seats and a larger cargo area in a graceful fastback body that retains the Z4’s unique aesthetic character while looking expressively new.
New Coupe Body
The Coupe corresponds mostly to the Z4, with its newly refined front end and hood lines; long-hood, cabin-back proportions; and double beltline in profile view. In particular, the lower, stylistically primary beltline begins above the outer headlight, curves upward over the wheels and then downward into the door, and “hikes“ sharply upward again, finally heading downward to conclude at the rear edge. Because the Coupe’s upper beltline has a visually longer continuity as it extends on past the new rear-quarter window with its characteristic BMW “reverse kink,“ the lower one even more boldly evokes the fender line of classic Grand Touring coupes, almost proclaiming for the Z4, "Yes, I was meant to be a Coupe too!"
Even stronger in its aesthetic impact is the fastback roofline. For one thing, in cross-section its center depression or “trough“ is reminiscent of certain GT coupes of the Italian coachbuilder Zagato in the Fifties and later. In profile view, it flows in a line parallel to the side windows‘ top edge, then continues on down to meet a crisp, stand-out cutoff point that forms a rear spoiler. Then it concludes at the bumper as the bottom edge of a rear hatch.
This hatch, including the entire roof from the rear window’s top edge to the bumper, opens wide and high to provide excellent access to a relatively roomy cargo area that can accommodate two golf bags.
In its interior design, the Coupe adopts the primary design themes and materials of the Roadster 3.0si. BMW’s “High Performance“ leather upholstery is standard; the seats, upper door-panel inserts, console-side kneepads and center armpad are in this leather and it is available in three color schemes: Black, Dream Red/Black and Beige. Brushed-aluminum trim highlights the dash and console; Poplar Grain wood trim is available at no extra cost in Light or Dark tone. New to the Coupe, naturally, are its cloth headliner, in Gray or Beige according to interior color scheme, and the A-pillar trim is also distinct from that of its Roadster counterpart.
As in the Roadster, sport seats, with prominent cushion and backrest side bolsters to support occupants during energetic driving, are standard. Their standard adjustment is 6-way manual; available in the Premium Package or as a stand-alone option is 8-way power adjustment, with memory for the driver’s seat. M sport seats, also described under Options, are available in combination with the Sport Package.
The steering wheel has manual tilt/telescopic adjustment. A contemporary instrument cluster, with white-on-gray analog speedometer and tachometer, includes LED indicators in the dial faces and between the dials; fuel and temperature gauges are set into the tachometer face.
All New Engine: BMW’s Advanced N52 Inline-6
Most vehicle manufacturers’ 6-cylinder engines are in the V-6 format, whose compactness is advantageous for small or midsize cars with front-wheel drive. By contrast, BMW’s inline 6-cylinder engines are brilliant for their smoothness and sound, and BMW customers as well as professional auto critics have come to treasure them for these attributes. BMW has retained this inline format while developing it toward reduced weight, more compact dimensions – and even more brilliant performance, smoothness and sound. An increase in fuel efficiency and even tighter control of emissions were also set as goals for the new engine.
Transmission: All choices are six-speed
The previous Z4 2.5i had a 5-speed manual transmission, the 3.0i model a 6-speed. For ’06, all Z4 models come standard with a 6-speed like the one Motor Trend praised in its August ’04 issue: “Like the engine,” commented the magazine, “the gearbox is a sweetheart. Said one editor, ‘The shifter has that positive, spring-loaded feel.’ Another wrote, ‘It snicks into its gates with an oiled authority.’”
There’s also good news for those who like their shifting automated – at least part of the time. Now the Z4 joins other BMW Series in offering a 6-speed automatic; compared to the previous 5-speed it’s fully 10% lighter, has a more efficient torque converter and new shift programming for improved responsiveness, actually operates with fewer internal clutches, and can reduce fuel consumption, particularly at cruising speeds when 6th gear is in frequent use.
As with other current BMW automatics, the STEPTRONIC feature offers drivers a choice of Normal, Sport and Manual modes. The Sport mode, in which shifts occur at higher engine speeds, is engaged by moving the lever leftward from Drive; the Manual mode is engaged when the driver manually chooses a gear by tipping the lever forward (for downshifts) or rearward (for upshifts).