Vital Stats

Engine:
2.0L I4
Power:
240 HP / 260 LB-FT
Transmission:
6-Speed Manual
0-60 Time:
5.5 Seconds
Drivetrain:
Rear-Wheel Drive
Curb Weight:
3,252 LBS
Seating:
2
MPG:
NA
Displacement, Replaced



For over a decade, only one premium automaker has offered a four-cylinder in the U.S. And while the recent rise of Audi in the States isn't solely because of its 2.0T engine, it's obvious that luxury buyers are finally coming around to the idea of a fuel-sipping four-pot. As a matter of fact, they're starting to demand it. And BMW is heeding the call.

Next year, BMW will begin offering its turbocharged and direct-injected 2.0-liter inline four-cylinder engine on the 3 Series and 5 Series, matching Audi car-for-car in the entry-level and mid-size segments. But before the sedans arrive on U.S. shores – nixing the naturally aspirated 3.0-liter inline-six in the process – BMW is slipping its TwinPower four-cylinder into an unlikely host: the 2012 Z4 sDrive28i.
Why unlikely? Just look at the length of that hood. It was designed from the onset to house one of BMW's venerable inline six-cylinder engines, but by lopping off two cylinders, BMW almost made a front-midship roadster.

2012 BMW Z4 sDrive28i 2.0-liter four-cylinder TwinPower engine

The mounting points used to fit the outgoing six-cylinder and the current turbocharged 3.0-liter are the same that hold this TwinPower turbo four in place. The byproduct is an impressive weight balance of 47.3/52.7 front-to-rear, an improvement – depending on your perspective – from the 47.9/52.1 of the six-cylinder model.

The new N20 four-cylinder is the first engine to benefit from BMW's recently revealed modular engine program, and it's the same mill we sampled earlier this year in the not-for-U.S.-consumption X1 xDrive28i. Power remains almost unchanged in the Z4, with 240 horsepower coming on between 5,000 and 6,500 RPM and 260 pound-feet of torque available from 1,250 and 4,800 revs. While the new N20 is down by 15 hp compared to the six, torque output is up some 40 lb-ft. And the extra juice is evident the moment you mash the throttle.

2012 BMW Z4 sDrive28i side profile view2012 BMW Z4 sDrive28i front view2012 BMW Z4 sDrive28i rear view

Fitted with the six-speed manual, BMW claims the Valvetronic-equipped four will hit 60 mph in 5.5 seconds, while the new eight-speed automatic gearbox does the deed in 5.6 seconds – a decrease of 0.1 and 0.4 seconds, respectively, over the six-cylinder. And as you'd expect, overall weight is down as well, with the new four-cylinder Z4 tipping the scales at 3,252 pounds, or about 33 pounds less than the outgoing sDrive28i.

Predictably, that minimal weight loss can't be felt from behind the wheel, but the extra grunt is front and center. There's a hint of turbo lag below 2,000 rpm when you're lining up for a pass, but as soon as the single, twin-scroll turbo starts huffing and puffing, the Z4 accelerates more authoritatively than the six. Driving the old and new models back-to-back, we also noticed slightly less dive and squat from the mildly reworked suspension (BMW isn't saying what's been done, aside from tweaking the springs and shocks for the new weight balance), but that's probably more a product of the box-fresh four-cylinder compared to the slightly abused previous generation tester.

2012 BMW Z4 sDrive28i interior2012 BMW Z4 sDrive28i tachometer2012 BMW Z4 sDrive28i steering wheel detail2012 BMW Z4 sDrive28i shifter

We also sampled both the manual 'box and new eight-speed automatic transmission, and while we're partial to choosing our own ratios through the slick stick, the auto's quick changes and steering wheel-mounted paddle shifters trade a modicum of engagement for a healthy dose of convenience. It's one of the few times we wouldn't fault buyers for choosing the slush box, and considering the average Z4 owner, we're sure it'll be the most popular transmission.

Naturally, you want numbers, but BMW is only giving one for now: $48,650 (plus $875 for destination). That's an increase of $1,200 over the outgoing model, but for 2012, Bluetooth and USB integration, along with trunk-through loading and an alarm system, all come standard, so the price bump is nearly a wash with the new equipment. As for the other figures you're after, well, BMW isn't giving up fuel economy estimates just yet. With the (surprisingly abrupt) start-stop system fitted to the Z4 sDrive28i, BMW claims that fuel efficiency is up by 20 percent over the six-cylinder in the EU test cycle, but that could go either up or down when the EPA estimates arrive later this year. Figuring the outgoing model managed 18/28 mpg city/highway, it's safe to assume the four-cylinder should ring in around 22 mpg in the city and 33 on the highway.

2012 BMW Z4 sDrive28i rear 3/4 view

More importantly, the character of the Z4 is completely unaffected by the new engine. The six's sonorous tones have been replaced with a hint of turbo whistle and a thrum from the exhaust, but the overall experience remains surprisingly unchanged. Grunt is up, fuel consumption is down and top-down cruising is just as good as it ever was. The replacement for displacement is here, and if it's executed this well, we'll gladly give up a liter or two for the privilege.


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    • 1 Second Ago
  • 84 Comments
      Compliance
      • 3 Years Ago
      Just buy a Miata.
        Justin Campanale
        • 3 Years Ago
        @Compliance
        Apples to oranges. The Miata has less power and doesn't have the same driving experience. If you are looking at a Miata, BMW is getting ready with the Z2.
      RSS007
      • 3 Years Ago
      Just name it Z4 sDrive20i.....not the inexplicable 28i for a 2000cc engine!!! I love BMW, but some of their stupidity needs to leave.
        mkM3
        • 3 Years Ago
        @RSS007
        Because there already is a Z4 sDrive 20i: http://www.bmwblog.com/2011/07/01/from-fall-2011-bmw-z4-sdrive20i-and-sdrive28i-with-n20-instead-of-six-cylinder/ They have the same displacement engine with different output. They can't just call both of them the same name.
      PatrickH
      • 3 Years Ago
      Wow, you guys really have accepted the fact that BMW has changed the Z3/4 Roadster into a boulevard cruiser. Suggesting that the slush box is a good choice and saying that the exhaust note degradation has no effect on the character of the vehicle? Sheesh.
        BG
        • 3 Years Ago
        @PatrickH
        Yuck, someone would buy a car like this with automatic transmission? I guess some people have more money than sense.
          Joe
          • 3 Years Ago
          @BG
          Umm, and what percentage of Corvette's are sold with autos? It seems rare to see a 6spd Corvette.
        Georgie Porgie
        • 3 Years Ago
        @PatrickH
        Well, the z4m 's were all stick. I suspect if you had a little devil in your blood, you always opted for the M anyways. Can't blame them for making a car that sold pretty well, and still offering a version ( atleast upto 2008 ) that appealed to those with a happier right ( and left ) foot.
      • 3 Years Ago
      [blocked]
        • 3 Years Ago
        [blocked]
          BG
          • 3 Years Ago
          This would at least be an honest name.
          • 3 Years Ago
          [blocked]
          mkM3
          • 3 Years Ago
          Because there already is a Z4 sDrive 20i: http://www.bmwblog.com/2011/07/01/from-fall-2011-bmw-z4-sdrive20i-and-sdrive28i-with-n20-instead-of-six-cylinder/ They have the same displacement engine with different output. They can't just call both of them the same name. just nowReport abusePermalinkrate uprate down
      tenspeeder
      • 3 Years Ago
      I've yet to see a Z4 at a dealer that wasn't priced well into the $50ks. Too bad. This one is much cleaner than the Bangle mess. Too bad more people are not able to buy and enjoy it.
        QCRamAir
        • 3 Years Ago
        @tenspeeder
        While I agree that this looks better than the Bangled-up version, I still think the Z3 was a far better-looking car than this. It had style, yet was a clean and simple design; not overdone at all. Just a pure roadster. The Z4, even the refreshed model, just has way too much going on, like it's trying way too hard to be stylish. I'm anxious to see what the Z4 replacement looks like, but with the design direction BMW has taken lately, maybe I shouldn't hold my breath.
          • 3 Years Ago
          @QCRamAir
          [blocked]
      Avinash Machado
      • 3 Years Ago
      Nice car,odd name.
      Shiftright
      • 3 Years Ago
      I'm all for efficient small displacement engines, but when you're replacing a gem like BMW's inline sixes, no thanks.
      CarCrazy24
      • 3 Years Ago
      Love the four cylinder option, they always tend to be more fun to drive! Unfortunately, as mentioned earlier the pricing for the 4-cylinder Z4 has put it in the firing line of a base Boxster, and I'm sorry but I would much rather have the Porsche.
      gpiliposyan
      • 3 Years Ago
      bmw mashina maeie mech podaril bkto ni but daje staruyu
      peakarach1
      • 3 Years Ago
      Very nice car but for my money I will take 370Z or G37 anyday.
      Chase
      • 3 Years Ago
      So many cars I'd rather own for 50k. You're not Porsche, BMW.
      • 3 Years Ago
      [blocked]
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