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View Full Version : BMW Four-Cylinder Engines Return to US in 2011


tim330i
02-01-2011, 02:30 PM
<img src="http://www.bimmerfest.com/forums/attachment.php?attachmentid=264784&d=1296595813" width="645" alt="" />

BMW announced the return of a four-cylinder engine to the US BMW line-up for the first time in since 1999. Like the company***8217;s latest 3.0-liter turbo inline six, the new 2.0-liter engine will combine twin-scroll turbocharging with high-pressure direct-injection and BMW***8217;s VALVETRONIC intake control. With 240 horsepower and 260 lb-ft of torque, it offers more power and torque than BMW***8217;s normally aspirated 3.0-liter inline six. It will arrive later in 2011.

Maximum output of 240 horsepower is achieved at 5,000 rpm, 1,500 rpm lower than in the normally-aspirated 3.0-liter inline six. The peak torque of 260 lb-ft, comes on stream at just 1,250 rpm. Not only is that 30% more torque than the aforementioned inline six, it also peaks 1,500 rpm earlier. The vigorous power comes on early and climbs steadily all the way to redline.

The four-cylinder engine with its all-aluminum crankcase is lighter and more compact than a six-cylinder engine of equivalent power. The turbocharger is a twin-scroll system. The exhaust streams leaving the two pairs of cylinders are kept completely separate as they flow through the exhaust manifold and the turbocharger, taking a spiral path to the turbine wheel. This configuration results in very low exhaust back pressure at low engine rpm, and allows the energy of the exhaust gas pulses to be optimally managed and translated into powerful rotation of the turbine blades, without a delay in throttle response.

The patented BMW VALVETRONIC system with seamlessly variable intake valve lift control dispenses with the throttle valve system typical of conventional engines. Instead, combustion air mass is controlled inside the engine, resulting in much faster response. Pumping losses are kept to a minimum, making the engine more efficient.

The High Precision Injection direct-injection system also helps to improve efficiency. Centrally positioned between the valves, solenoid injectors with a maximum injection pressure of 200 bar (2,900 psi) precisely control the supply of fuel. The fuel is injected very close to the spark plug, resulting in clean and homogeneous combustion.

The cooling effect of the injected fuel also allows for a higher compression ratio than might otherwise be possible. This results in further efficiency improvements.

US-specific model and timing information will follow at a later date, but this new chapter in the story of BMW EfficientDynamics will arrive later this year.

chrisk03
02-01-2011, 04:42 PM
With this announcement, hope it means they're confident in a HPFP fix for good.

mhs525
02-01-2011, 07:51 PM
I have zero interest in a turbo 4 banger :thumbdwn:

I came to BMW 15 yrs ago for the pure driving experience and smooth as silk normally aspirated in line six with the incredible throttle response. I have since moved on to the normally aspirated V8 for their great power and still great throttle response.

I have had many turbo cars as loaners and the throttle lag from a stop is down right dangerous. My next car will be the last NA V8, an M3 sedan, or I'm getting CPO Panamera.

HoustonScott
02-02-2011, 07:11 AM
Keep in mind that all cars will have to get 36mpg by law in the USA by 2016. No doubt four's would come.

HS

BayAreaBimmer
02-02-2011, 10:30 AM
I agree with chrisk, they better make sure that HPFP works flawlessly if they want this to do well. Nice idea though :thumbup:

BayAreaBimmer
02-02-2011, 10:34 AM
keep in mind that all cars will have to get 36mpg by law in the usa by 2016. No doubt four's would come.

Hs

+1

BeemerMikeTX
02-02-2011, 10:52 AM
If BMW would bring over one of its four-cylinder turbo DIESEL engines, especially in a 3-door or 5-door 1-series, then maybe. Otherwise, I'll probably just get my German turbo four gasoline engines in a VW or Audi, depending on whether or not I want to pay the "premium car" extra charge.

BayAreaBimmer
02-02-2011, 11:02 AM
If BMW would bring over one of its four-cylinder turbo DIESEL engines, especially in a 3-door or 5-door 1-series, then maybe. Otherwise, I'll probably just get my German turbo four gasoline engines in a VW or Audi, depending on whether or not I want to pay the "premium car" extra charge.

+1 A four cylinder turbo diesel would be sweeeet, the 4 cylinder mini D is pretty sweet :thumbup:

Munich77
02-02-2011, 01:28 PM
I think there are rumors that the 2.0 diesel is going to be coming for the 3 series (I am guessing next generation). All of the European manufacturers will start importing their more fuel efficient diesels to comply with the new government fuel economy standards.

BayAreaBimmer
02-02-2011, 01:46 PM
I think there are rumors that the 2.0 diesel is going to be coming for the 3 series (I am guessing next generation). All of the European manufacturers will start importing their more fuel efficient diesels to comply with the new government fuel economy standards.

That's a great idea, interesting :thumbup:

SteVTEC
02-02-2011, 05:16 PM
I've seen the power curves for this engine and the torque curve drops off like a rock after 5000rpm, so how can BMW possibly claim that the "power climbs steadily all the way to redline" :thumbdwn:

Had been planning to ED a '12 528i, but supposedly this turbo-4 engine is going to replace the N52, and I have no interest in it. BMW to me = NA straight-6. Nothing else like them, and nothing can truly replace them in my mind. Paper specs might be better, but it won't drive the same. No interest in the 535i either and too late to do an ED for us on an '11 528i now, so no idea what we'll do. Maybe get a closeout '11 528i off the lot, or CPO an 06-07 530i E60, or even the 08-10 528i. :dunno: Have no interest in turbos and especially no interest in a turbo 4-banger. If I really wanted one of those I too would buy an Audi.

BayAreaBimmer
02-02-2011, 05:20 PM
I've seen the power curves for this engine and the torque curve drops off like a rock after 5000rpm, so how can BMW possibly claim that the "power climbs steadily all the way to redline" :thumbdwn:

Had been planning to ED a '12 528i, but supposedly this turbo-4 engine is going to replace the N52, and I have no interest in it. BMW to me = NA straight-6. Nothing else like them, and nothing can truly replace them in my mind. Paper specs might be better, but it won't drive the same. No interest in the 535i either and too late to do an ED for us on an '11 528i now, so no idea what we'll do. Maybe get a closeout '11 528i off the lot, or CPO an 06-07 530i E60, or even the 08-10 528i. :dunno: Have no interest in turbos and especially no interest in a turbo 4-banger. If I really wanted one of those I too would buy an Audi.

+1 :clap:

Saintor
02-05-2011, 06:00 AM
Rumors that America might need less oil? No problem, petrol companies will jack up oil prices accordingly.

That's exactly what they did in Europe 30 years ago (although that they also have more taxes).

Elias
02-05-2011, 03:43 PM
I have nothing against four cylinder engines gas, Diesel, or Turbo, I do have a problem paying 50 large in a 5 series to get a four banger. Like someone else said if I want a four banger German car I would buy a VW!