Test of 2006 BMW Z4 M Coupe and Roadster

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In BMW's 2006 M Coupe, it's all about the steering wheel.

As anyone who's ever driven a BMW knows, the steering wheel represents a crucial element in cars wearing the blue-and-white roundel. In other automobiles the steering wheel merely serves as a directional control device. But in BMW automobiles it's more like an ergonomically shaped syringe injecting the car's soul directly into the driver's cerebellum.

In the new M Coupe, the strikingly large diameter of the rim is wrapped in supple leather, providing a sumptuous yet brawny place to land your grip. That same luxuriant, meaty feel is maintained throughout every aspect of the car from its hefty steering effort and shifter action to its heavily bolstered leather seats to its love-it-or-leave-it styling.

Brewed with a 'tude
This overtly edgy character is paired to one of the world's preeminent engines. As an heir to BMW Motorsports' magnificent 3.2-liter, inline-six drivetrain, the M Coupe could rightly be described as the M3's little brother. This choice power plant makes the M Coupe transition with 330 horsepower and 262 pound-feet of torque intact. And it continues to provide unrestrained gyrations up to the 8,000-rpm redline, along with a broad torque band that thrusts the car forward with the immediacy of a 1960s muscle car.

But where the M3 went to finishing school on a full-ride scholarship, the M Coupe dropped out early, told his guidance counselor to pound sand and hooked up with a traveling blues band. This attitude is apparent the moment you fire up the engine. A low-frequency rumble, more in line with Milwaukee V-twins than Munich straight-sixes, has supplanted the M3's high-pitched exhaust squeal. Burly shifter action has long been an M3 hallmark, but the M3's optional SMG tranny is not lurking on the M Coupe's option list to rescue wannabe Villeneuves from the task of actually driving this feisty two-seater.

A track-tive design
We were fortunate enough to do just that around the 4 miles and 14 turns that make up the Road America race circuit in Elkhart Lake, Wisconsin. With an aluminum chassis as rigid as Republican legislation riding on
18-inch M Double-Spoke alloy wheels, the M Coupe offers the kind of instant response and at-the-limit confidence normally associated with track-ready models like the Lotus Exige. Numerous tweaks to the
base Z4 coupe, including a wider front track, stronger rear subframe and hydraulic power steering (the Z4's is electric) conspire with M-specific suspension calibrations to create an incredibly tossable, leather-lined
go-kart wearing BMW badges.

Total vehicle weight is 3,230 pounds, with an aluminum hood and upgraded aluminum front suspension pieces contributing to the car's svelte nature and 50.2/49.8 weight distribution. Slowing the M Coupe is accomplished via the same brake system offered on the M3 Competition Package. That means dual-compound, cross-drilled and ventilated rotors at each corner, with 13.7-inch discs up front and 12.9-inch units in back. Tire specifications are yet another point of deviation between the M Coupe and lesser models, with the base Z4 Coupe's run-flats replaced by traditional Z-rated Continental tires sized 225/45-18 (front) and 255/40-18 (rear).

Techno-savvy
Like many M products the M Coupe features two throttle-response programs. The default "Normal" setting is in use whenever the car is started, but pushing a console-mounted button easily accesses the "Sport" mode. This mode increases the ratio of throttle opening to pedal movement and, in conjunction with BMW's double VANOS variable valve technology, provides nearly instantaneous access to the engine's highest performance levels.

There's a potential dark side to this much power and torque in a lightweight, short-wheelbase coupe, but BMW has tried to ensure those 330 horses cause more joy than sorrow. A mechanical limited-slip differential uses viscous fluid to balance power between the rear wheels, and Dynamic Stability Control can do everything from reducing engine torque to applying individual brake pressure when it senses abnormal understeer or oversteer. Of course the latter feature can be deactivated for those times when you want to experience oversteer, a circumstance the M Coupe seems rather well suited to.

Can't escape its roots
Despite the M Coupe's somewhat gangsta attitude at least in comparison to the rest of the BMW family tree there remains a wealth of premium features on both the standard and optional equipment lists. Every car, for instance, comes with automatic xenon headlights,
rain-sensing wipers, heated outside mirrors and automatic climate control. For buyers who like their iron fists in a fully lined velvet glove, there are
fat-cat items ranging from DVD navigation to three-stage heated seats to walnut interior trim. There's even a premium THX-certified audio system with eight speakers and dual subwoofers. Pricing starts at $49,995, which includes the $695 destination charge.

But don't let the Nappa leather fool you; the 2006 BMW Z4 M Coupe isn't a car for posers. Ride quality is about as stiff as any BMW we've driven and, as stated, steering and shifter action require a firm hand make that a firm hand, arm and shoulder. But if you actually buy ultimate driving machines because you enjoy driving, the car will not disappoint.

In fact, while we know that guidance counselor won't admit to it, little M has made him proud.
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source:http://www.edmunds.com/insideline/do/Drives/FirstDrives/articleId=115741#2
 
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Professor Ulrich Bruhnke is the head of BMW's Motorsport division. He's a big, burly German who would be quite intimidating if he didn't smile so much. Before BMW, he headed up the AMG arm of Mercedes-Benz. This guy knows horsepower.

After a few laps around Spain's Jerez road course in the new 2006 BMW M Roadster, a high-performance version of the standard Z4, Bruhnke is smiling again. He hardly seems the roadster type, but the big German is grinning like a Jimmy Carter impersonator as he puts the spurs to the little convertible. Apparently 330 horsepower can make even the otherwise tame Z4 satisfying to Germany's sultan of speed.

Transforming the ultimate shower gift into the manly M Roadster wasn't as difficult as it sounds. Take the most masculine BMW there is, the soon-to-be-replaced M3 coupe and swipe all of its best hardware. We're talking everything from the engine, steering system, brakes, variable differential lock and a handful of suspension parts. M Roadsters also have unique 18-inch wheels and bodywork, not to mention 218 fewer pounds to carry around compared to the M3.

Our turn at the wheel
Sitting lower to the ground than the already low Z4, the M Roadster isn't the easiest car to get into. You swing the door past your knees and then try to look graceful falling into the seats, which in this case come standard with leather and extra bolstering. Although you sit deep in the cockpit, the view over the arched dash is still good. There's enough legroom for 6-footers but the cockpit feels tight.

Big analog gauges with red needles sit behind a thick Motorsport steering wheel. The tachometer is also Motorsport spec, with a variable redline that settles at 8,000 rpm when the oil is fully warmed up. The speedometer reads to 180 mph, but the computer will cut you off at 155 mph.

Our test car's interior is drab in all black. It's a mix of good-looking plastics and a new trim option BMW calls "Carbon Leather." It's black leather with a carbon-fiber pattern, and although the combination doesn't look as ridiculous as it sounds, the metallic trim which comes standard looks better. Everything else is similar to the Z4 in design and feel except for the automatic climate-control knobs. They get extra rubber trim around the edges for better grip during those tricky midcorner fan-speed adjustments.

All the right hardware
There's no annoying start button as in the 3 Series, so you turn an actual key to fire up the M Roadster. The 3.2-liter straight six is identical to the M3's so it has an iron-block, double VANOS variable valve timing system and an 11.5:1 compression ratio. A slightly more restrictive and quieter exhaust shaves off 3 horsepower, leaving the M Roadster with an official rating of 330 hp at 7,900 rpm. Torque remains the same at 262 pound-feet at 4,900 rpm.

A new six-speed manual transmission is used since the M3's six-speed didn't fit. It's the only transmission available and its final gear ratios are virtually the same as in the M3, yet BMW claims a quicker 0-60 time (4.8 to 4.9) for the heavier coupe. It couldn't explain why.

You'll never miss the extra tenth
Like most BMWs, the M Roadster feels stronger than its horsepower and torque numbers suggest. Other than a little softness below 2,500 rpm, it's strong enough to smack your head off the roll hoops with a jab of the throttle. Pressing the "sport" button has a less noticeable effect than it does in the M3. Instead of an instant quickening of the throttle's reactions, the M Roadster has a more subtle program that only kicks in after you get into the gas a little further.

The jury is still out on the exhaust note. The M Roadster was tuned for a softer tone than the M3 but it's still a mix of raspy straight six and what sounds like a loose catalytic converter. There's no question about the new gearbox — it's perfect. Unlike some BMW shifters which can feel a little delicate, this stick can be slammed through the gears as fast as you can rip it.

Although the M Roadster shares its steering system, brakes and numerous suspension parts with the M3, most of the parts were tuned specifically for it. The ride quality is noticeably better than the M3 on the street. It's remarkably stiff for a convertible, yet you rarely get any harsh impacts. Steering feel is about perfect and the brakes are way more than you'll ever need for the street.

Track time
In addition to our time on the street we did a few laps of Jerez ourselves. As stiff and precise as the M Roadster is at normal speeds, rip through a corner fast enough and there is body roll. Not your typical sloppy, convertible kind of roll, but enough to let you know when you're approaching the limits.

Compared to the Z4 roadster, the M Roadster has a half-inch-wider track, reconfigured lower control arms and a new rear subframe that allows it to run the same Variable Differential Lock used in the M3 and M5.

Get to the limit and the Dynamic Stability Control system shuts things down with reduced throttle and a few grabs of the brakes. It won't stop you dead in your tracks like some systems, but having any real fun still requires shutting it off completely, a feature BMW still thankfully offers.

With the electronic governors turned off, you begin to appreciate how well the variable limited-slip differential distributes the power. Combined with plenty of traction from the 255/40 tires in back, the M Roadster launches out of corners as fast as its brakes will let you dive into them. The massive cross-drilled rotors are the same ones used with the M3's competition package and although they shrieked for mercy after each lap they never failed to provide plenty of stopping power.

Get your priorities in order
With a base price of $51,300, the 2006 BMW M Roadster will run you $2,400 more than an M3 coupe. That doesn't make the roadster much of a bargain considering it isn't any faster and has two fewer seats and a smaller trunk.

Compare it to other high-performance convertibles, however, and the M Roadster is the new king of performance per dollar. It's not only $3,400 cheaper than a Porsche Boxster S, it's $10K less than a Mercedes SLK55 AMG. And if BMW's numbers are correct, the M Roadster is faster than both.

Somewhere out there Mr. Bruhnke is smiling.

source:http://www.edmunds.com/insideline/do/Drives/FirstDrives/articleId=109432#2
 
I think I need one of these...I loved the old M-coupes, even with the love-it-or-hate it body styling.
 
I just test drove a Z4 M coupe! Its pure sex!!! NO its better then sex because it would last alot longer!!LOL
 
Rickman said:
I wish I could afford an old M Coupe.

They're not that unreasonably priced. They were actually one of the cars I was considering before I ended up with the 'speed. What kept me from buying it was timing (over the Thanksgiving holiday and I couldn't get the loan in time for the gentleman who was selling it) and maintenance costs. Who knows - there will eventually be one in the garage at one point in the future! :)
 
RacerXGirl said:
They're not that unreasonably priced. They were actually one of the cars I was considering before I ended up with the 'speed. What kept me from buying it was timing (over the Thanksgiving holiday and I couldn't get the loan in time for the gentleman who was selling it) and maintenance costs. Who knows - there will eventually be one in the garage at one point in the future! :)

Z3 M Coupes and Roadsters are not that bad with mainatenance costs. I would love to a Z3 M. It would benefit me to buy because of my work.
 
that coupe is pure sex just read the article in my autoweek on the throne the other day... beautiful lines on that thing for sure
 
I love every dam bit of the M coupe... except I just can't get past that front air dam. Jesus that thing is ugly. It would be a 10 out of 10 if not for the front. I know they'll be some nice Hamman options etc... for a face lift, but for 50k+ it's just a real shame to have to aftermarket to clean the face up. However, the rear of that car more than makes up for the front :D
 
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