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Luxury Performance Sedans

10339 messages,  Last post on May 30, 2013 at 3:26 PM

You are in the Acura RL Forum.

What is this discussion about? Lexus GS 430, Acura RL, BMW 5 Series, Volvo S80, Audi A6, Infiniti M35, Infiniti M45, Mercedes-Benz E-Class, Cadillac STS, Sedan

Messages Page 1029 of 1035

#10277 of 10339 Re: Looking for used Luxury Sedan [michael0137] by qbrozen

Jul 02, 2012 (8:59 am)

Replying to: michael0137 (Jul 02, 2012 8:31 am)
I don't like to do this normally, but since you brought it up...
 
Racing a pickup truck? Really??
 
TL SH-AWD 0-60 = 6.4s; 1/4-mile = 14.9s; mileage = 16/24
4-cyl 528i 0-60 = 6.0s; 1/4-mile = ?; mileage 20/30
 
The 528i is still estimated, but the reality won't be far off. Clearly, the 4-cyl is not a hindrance if you want to compare to the Acura.

#10278 of 10339 Re: Looking for used Luxury Sedan [qbrozen] by michael0137

Jul 02, 2012 (1:12 pm)

Replying to: qbrozen (Jul 02, 2012 8:59 am)
I am Michael's wife posting under his account - so don't anyone get confused when I said "my husband"! It was a bit juvenile, but hey it was a recently new Dodge HEMI V8 - 0-60 in 6.8 according to road tests.
 
As for the BMW?? I don't care WHAT they do to the engine with turbo charging - it is a 4 banger. Acura has been constantly criticized for having a V6 versus a V8 - standard - and now BMW has a twin turbocharged 4??? Why aren't they being destroyed in the press? Advertising $$$$$$$ - that's why.

#10279 of 10339 Re: Looking for used Luxury Sedan [michael0137] by qbrozen

Jul 02, 2012 (2:10 pm)

Replying to: michael0137 (Jul 02, 2012 1:12 pm)
As for the BMW?? I don't care WHAT they do to the engine with turbo charging - it is a 4 banger. Acura has been constantly criticized for having a V6 versus a V8 - standard - and now BMW has a twin turbocharged 4??? Why aren't they being destroyed in the press? Advertising $$$$$$$ - that's why.
 
That's not completely true. Acura has been criticized for not having a V8 as an option. All the competitors had 6-cyls in the base models, so that was never a criticism toward Acura.
 
In other words, the competitors had optional models that were significantly faster than the Acura. So someone wanting more power had to look elsewhere. It has definitely cost them those sales.

#10280 of 10339 Re: Looking for used Luxury Sedan [qbrozen] by houdini1

Jul 02, 2012 (2:57 pm)

Replying to: qbrozen (Jul 02, 2012 2:10 pm)
Does BMW have 6-cyl options for the 3 and 5 series? I have just never liked 4 cyl engines, turbo or not, especially in upscale cars. Just too harsh and rough at idle and at start up.
 
Love the BMW 6 cyl. I think BMW is making a mistake. Also interesting to note that Acura is doing the opposite in their RDX by going from a turbo 4 to a 6 cyl.
 
Maybe BMW is trying to meet mpg goals?

#10281 of 10339 Re: Looking for used Luxury Sedan [houdini1] by ghstudio

Jul 02, 2012 (3:21 pm)

Replying to: houdini1 (Jul 02, 2012 2:57 pm)
You might want to test drive a lotus....makes you think about 4 cylinder cars a bit differently

#10282 of 10339 Re: Looking for used Luxury Sedan [houdini1] by qbrozen

Jul 02, 2012 (5:56 pm)

Replying to: houdini1 (Jul 02, 2012 2:57 pm)
Maybe BMW is trying to meet mpg goals?
 
Oh, absolutely. That's why everyone is scaling down and adding turbos.
 
Interestingly, I don't find my twin-turbo BMW I6 to be any smoother than my VW 2.0T was.

#10283 of 10339 Re: Looking for used Luxury Sedan [houdini1] by james27

Jul 03, 2012 (6:23 pm)

Replying to: houdini1 (Jul 02, 2012 2:57 pm)
Certainly...BMW makes both 6 and 8-cylinder versions of the 5-series, as well as the 3 and 7 series. So, you get to determine the amount of power you want available. But, with the turbocharger making so much torque at low RPM's (and it is torque that gets you moving), it makes most of the other engines look like porkers off the line. The BMW make max torque at around 1200rpm. Do you know where the Acura needs to turn to achieve its max torque? That's what allows it to go up a hill without downshifting, not Hp. That's what allows it to accellerate at low rpm, not Hp. And, with all that torque, it can cruise at really low rpm, saving fuel and lowering noise. How fast is your engine turning at 80mph? The BMW (6) turns less than 2K. That saves wear and tear and makes for a much more comfortable cruise.

#10284 of 10339 BMW twin turbo 4 Re: Looking for used Luxury Sedan [michael0137] by rayainsw

Jul 05, 2012 (6:18 am)

Replying to: michael0137 (Jul 02, 2012 1:12 pm)
'now BMW has a twin turbocharged 4??? '
Actually the new BMW 4 has a single 'twin-scroll' turbo charger.
'At 240 bhp, the 528i’s 2.0-liter inline-4 with a twin-scroll turbo'
- from R&T
http://www.roadandtrack.com/tests/drives/2012-bmw-528i
- Ray
Odd wording....

#10285 of 10339 Re: Looking for used Luxury Sedan [james27] by houdini1

Jul 05, 2012 (2:22 pm)

Replying to: james27 (Jul 03, 2012 6:23 pm)
How about the non turbo in-line 6? Has it gone away?

#10286 of 10339 Re: Looking for used Luxury Sedan [houdini1] by james27

Jul 05, 2012 (7:30 pm)

Replying to: houdini1 (Jul 05, 2012 2:22 pm)
I think so, but not sure (at least in the USA). The EPA rules require some significant fleet fuel economy increases, and smaller is better. But to retain the same power, turbochargers are being added. The new 4 has more power AND torque than the I-6 it replaces and gets significantly better mileage. Things will continue to get tighter and tighter, and you'll see more tweaks to improve economy whether we like it or not.
 
Many of the engines have what they call twin-scroll turbo, but it is just one turbo (while some models do have multiple actual turbochargers). There's a valve that adjusts to bring the turbo up to speed quicker so it can add power at much lower engine rpm than a typical single unit. This is less complicated than using multiple real turbos where often, one was smaller to get up to speed quicker, but the other one was larger to provide max boost at higher engine speeds. The timing on that type is messier, and you can have a hole in the middle of the power band. Things are much more linear with the twin-scroll design.

Messages Page 1029 of 1035

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