backtop


Print 70 comment(s) - last by EricMartello.. on Apr 21 at 11:50 PM


BMW Z4 Roadster
First turbo four model will arrive this fall

Earlier this year, we reported that BMW's normally aspirated inline-6 engines will be ushered out and replaced by a new family of turbocharged four-cylinder engines. BMW today confirmed that four-cylinder power would return to U.S.-bound BMWs after a 10+ year absence. 

The first model to get BMW's new 2.0-liter TwinPower Turbo four-cylinder engine will be the Z4 sDrive28i Roadster (say that five times fast). The engine develops 240 hp and 260 lb-ft of torque (30 percent more torque at 1,500 fewer RPMs than the naturally aspirated 3.0-liter inline-6).

BMW says that the new turbo four will be 20 percent more fuel efficient than the inline-6 when paired with the 8-speed automatic transmission. We're sure that there are fuel efficiency gains to be made with the 6-speed manual transmission as well, but it's likely nowhere near 20 percent (or else BMW would have mentioned it in the press release).

The Z4 sDrive28i Roadster will arrive in showrooms this fall, and the turbo four will likely filter down to other BMW models soon after.



Comments     Threshold


This article is over a month old, voting and posting comments is disabled

RE: Just wish it ran on regular
By Spuke on 4/19/2011 11:58:42 AM , Rating: 2
quote:
That being said, I'm gonna just say that their powertrain engineers know a lot more about this than you or me
I'm certain they do AND it easily could be done with direct injection. More than likely they're leaving some hp on the table. In the Solstice's case, there was no difference in fuel economy. My guess is that Americans tend to focus on price at the pump instead of overall cost, Hyundai detuned the engine to 87 octane for PR points. Since that engine is more than likely tuned to NOT recognize higher octane, it would not behoove you to put anything other than that.


RE: Just wish it ran on regular
By Reclaimer77 on 4/19/2011 7:09:34 PM , Rating: 2
Nah the ECU knows. Thanks to the power of Google, it looks like you lose about 10hp in the Sonata when the ECU is in the regular octane fuel map. The Sonata is NOT tuned to assume you are running regular. It has the same type of learning/reacting fuel mapping ECU like is in every other vehicle.

Here's the fun part. How does the ECU know when you tank up with 87 octane? When the knock-sensor kicks in, the ECU remembers the engine RPM and load and other factors of when the knock happened and goes into a sort of "knock learning" mode.

Knock sensors and ECU timing/ignition retarding aren't infallible. So basically the knocks that the ECU uses to determine what type of fuel you are running can STILL be the knocks that kill your engine in a turbo car.

Like I said, playing with fire. Brandon has a lot of faith in the same engineers who about five years ago were cranking out the most crappy cars on the road: Korean.


RE: Just wish it ran on regular
By YashBudini on 4/19/2011 8:15:04 PM , Rating: 2
No company starts by making the perfect car. Even if a company has been in business for years a sudden explosion of growth will inevitably compromise quality until the company fully adapts.

Hyundai is actually quite large, turning on a dime is rather unrealistic.

http://en.wikipedia.org/wiki/Hyundai

Race has nothing to do with it.


RE: Just wish it ran on regular
By Reclaimer77 on 4/19/2011 8:48:22 PM , Rating: 2
Right clearly I was referring to their race instead of the REGION THE CARS COME FROM!

Never waste an opportunity to make me fit a stereotype though Yash. Keep up the good work.

Fact is Hyndai and Kia are way better today than they were. And they need to keep it if they want to shake their previous image.


RE: Just wish it ran on regular
By YashBudini on 4/19/2011 10:37:52 PM , Rating: 2
Everyone must deal with guilt by association. However, it seemed that way, with or without your signature.

A friend just got a new Hyundai. IE a brand new replacement under the Lemon Law. 8 out of 30 months in the shop, it was last waiting for it's 4th transmission. Typical dealer inventory does not include whole transmissions. (They should have considered they're dealing with a symptom and not a cause by now.)


RE: Just wish it ran on regular
By Reclaimer77 on 4/20/2011 7:42:16 AM , Rating: 2
quote:
Everyone must deal with guilt by association. However, it seemed that way, with or without your signature.


Fair enough.

quote:
A friend just got a new Hyundai. IE a brand new replacement under the Lemon Law. 8 out of 30 months in the shop, it was last waiting for it's 4th transmission. Typical dealer inventory does not include whole transmissions. (They should have considered they're dealing with a symptom and not a cause by now.)


WOW!

Sounds like your friend needs to lawyer up. That sucks.


"Mac OS X is like living in a farmhouse in the country with no locks, and Windows is living in a house with bars on the windows in the bad part of town." -- Charlie Miller














botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki