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2010 2011 BMW 5 Series Forum F10 BMW 5-Series (F10) Forums General 5-Series Sedan and Wagon (F10 / F11) Forum Watch the 2012 528i Turbo 4 (N20) Take on Its Older 6 Cylinder on the Road and Dyno
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      04-26-2012, 02:12 PM   #23
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Given how close those two cars are acceleration wise, I would take the refinement, quietness and the smoothness of the I6 over the 4 banger.
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      04-26-2012, 02:16 PM   #24
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I have a question for both motors.

How about reliability issues for the N20? In 15-20 years considering both the 528i 4-cyl and 6 cyl were not abused and driven pretty much everyday, at some point the N20's turbocharger may need it's bearing changed or even worse it's turbocharger replaced.

In 15-20 years the the 6-cyl may also have gone through reapairs like alternator or starter being changed, etc, but the parts and labor spent on getting a replacement turbocharger on the 4-cyl will be very expensive compared to the 6 cyl.

My dad has a 1990 525i and it still runs good to this day. The only repair that was done to it was to replace it's battery and starter. If that was a turbo, the turbocharger may have already seized considering it has been 22 years since the car was purchased.
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      04-26-2012, 02:21 PM   #25
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So, I4 was quicker than the I6, I'm cool with that because the factory says that the I4 has 30lb-ft more torque than the I6. However, what's up with the HP ratings? The factory rated them both at 240 HP but the I6 only put out 208 HP at the crank on this particular dyno. Not really liking that. They should both be putting out at least 240 HP at the crank.
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      04-26-2012, 02:33 PM   #26
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Quote:
Originally Posted by Frankisme View Post
I test drove both myself. The four is definitely quicker. There is no tip in issue on the throttle either. The six really had a dead spot on acceleration.
I agree, the N20 528 felt a lot quicker and responsive to me that the i6. I was looking to buy a 2011 528i right before the 2012s came out. Purchase got delayed and I went back in and drove the first 2012 528 that they had and was sold. Glad it worked out that way
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      04-26-2012, 02:48 PM   #27
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Well, regarding reliability,the turbo's is a part which breaks down within 130-180.000 km.
Which means within 6 years or so it/they need to be replaced.
It's not cheap, especially the modern turbo's.
What might be worse is when these breaks down, and you drive with it, the Hole engine can be destroyed!

So surely the NA 6 is more durable in the long run, but with these bullshit clima regulations, turbo's and downsizing is a must, sadly!
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      04-26-2012, 02:56 PM   #28
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Quote:
Originally Posted by ron_jeremy View Post
Well, regarding reliability,the turbo's is a part which breaks down within 130-180.000 km.
Which means within 6 years or so it/they need to be replaced.
It's not cheap, especially the modern turbo's.
What might be worse is when these breaks down, and you drive with it, the Hole engine can be destroyed!

So surely the NA 6 is more durable in the long run, but with these bullshit clima regulations, turbo's and downsizing is a must, sadly!
That's what I thought as well. Although the F20 is more efficient, the NA 6 cyl is definitely more durable compared to a FI motor in the long run. I know someone who had to replace his turbo on his EVO IX. Very expensive to replace.

Thanks for the input!
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      04-26-2012, 03:33 PM   #29
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That turbo 4 married to the eight speed box is a jewel!!
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      04-26-2012, 04:01 PM   #30
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Quote:
Originally Posted by Yallmb
So, I4 was quicker than the I6, I'm cool with that because the factory says that the I4 has 30lb-ft more torque than the I6. However, what's up with the HP ratings? The factory rated them both at 240 HP but the I6 only put out 208 HP at the crank on this particular dyno. Not really liking that. They should both be putting out at least 240 HP at the crank.
Old 528i was 230hp/200trq was it not? That's why it would be putting down 208hp to the wheels.

Please correct me of I'm wrong, but it's obvious the newer more aggressive powerplant would abviously be faster. I think they screwed up there numbers and that's why people are getting confused.
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      04-26-2012, 04:27 PM   #31
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I'll take the 6. No sound = no fun.
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      04-26-2012, 04:33 PM   #32
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I want to add another remark.

For the comparison they have chosen a car with I6 with natural aspirated port fuel injection (N52) and 6-speed automatic against a car with I4 with turbo charged direct fuel injection and 8-speed automatic.

If they would have chosen a 5-type with I6 and direct fuel injection (N53, as common in Europe) and the 8-speed automatic, the results would have been closer together. No question, that the turbo I4 would also have won in terms of figures, but only with a very narrow margin.
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      04-26-2012, 06:41 PM   #33
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WOW Iam so amazed that Classic BMW is on the front page of e90post.com This is the dealership I have always taken every single one of my vehicles to, including my e63 BMW M6 DINAN STROKER, (past), my 09 e92 M3 (past), my pops X5M, my 09 e92 BMW 335 FBO, and even more down the list that I cant even remember lol. I ordered my M5 about 7 months ago and I finally got to build it a couple days ago!! Classic BMW is the most amazing dealership you can ask for. I honestly would never ever go to any other brand of cars just because of how Classic BMW treats not only me, but everyone else. Their customer service is outstanding in every single way and I guarantee this video was shot in Mexico Either way, I cant say enough great things about Classic BMW and thats why they are about to be the only ///M dealership in the nation.... (heard from a very reliable source) Im glad I live only a few miles away from the only M dealership in the United States lol you can basically see it from my backyard balcony Its also pretty cool that they have there own race team that runs in the touring car series and are very competitive. Also, not many "normal" dealerships have a dyno in there shop! And its not a dynojet, its a dyno dynamics dyno so no over inflated numbers, just the real deal. Classic BMW is very focused on performance products for there vehicles as well as cosmetic upgrades. They are also a Certified DINAN dealer and have never given me ANY issues with ANY of my vehicles. hard to find a dealership that the salesman actually have knowledge of their vehicles and the M cars. They are 10 out of 10 in my opinion! Sorry for the long message.... just my 2cents
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      04-26-2012, 09:18 PM   #34
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Quote:
Originally Posted by Yallmb
So, I4 was quicker than the I6, I'm cool with that because the factory says that the I4 has 30lb-ft more torque than the I6. However, what's up with the HP ratings? The factory rated them both at 240 HP but the I6 only put out 208 HP at the crank on this particular dyno. Not really liking that. They should both be putting out at least 240 HP at the crank.
Yeah what's up with that? I agree that it seems that BMW is only putting actual horsepower at crank for turbo cars but for naturally aspirated, it's with driveline loss. If they want a "real comparison " give the i6 a chip to get it to 240 crank and I'm sure they will be side by side. Of course that defeats the purpose of the "show " . They , BMW are clearly trying to make customers happier about the 4cyl models by giving them higher horsepower numbers than stated so they will beat the previous engine model. Just wait for the first reprogram by service where they detune it to say 210 crank, and let's see if people complain. ( same as the 335i reprogram dilemma )

*off soap box*
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      04-26-2012, 09:40 PM   #35
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I'll take a turbo 6!
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      04-26-2012, 11:27 PM   #36
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Quote:
Originally Posted by Zebra99 View Post
Old 528i was 230hp/200trq was it not? That's why it would be putting down 208hp to the wheels.

Please correct me of I'm wrong, but it's obvious the newer more aggressive powerplant would abviously be faster. I think they screwed up there numbers and that's why people are getting confused.
Nope, the previous F10 528i used the N52B30 I6 that put out 240 hp and 230 lb·ft in US trim. Now, if they had said the hp output at the wheels was 208 I would have said "OK, driveline loss" but they actually said that it was 208 hp at the crank which should be 240. So, yeah, I think that they either screwed up the numbers as you said or there is something going on with that dyno or something wrong with the car.
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      04-27-2012, 12:44 AM   #37
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Quote:
Originally Posted by HTJ3BA View Post
I want to add another remark.

For the comparison they have chosen a car with I6 with natural aspirated port fuel injection (N52) and 6-speed automatic against a car with I4 with turbo charged direct fuel injection and 8-speed automatic.

If they would have chosen a 5-type with I6 and direct fuel injection (N53, as common in Europe) and the 8-speed automatic, the results would have been closer together. No question, that the turbo I4 would also have won in terms of figures, but only with a very narrow margin.
Is it really a 6 speed auto on the 6 cyl. 528?

I thought all F10 have the 8 speed auto gearbox.
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      04-27-2012, 01:52 AM   #38
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I think the NA 6 did quite well against the turbo 4 considering the torque and power deficiency. I'd probably be willing to sacrifice that much performance for the legendary sound and smoothness of the inline 6.
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      04-27-2012, 02:49 AM   #39
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Is it really a 6 speed auto on the 6 cyl. 528?

I thought all F10 have the 8 speed auto gearbox.
You are right, I don't know what that guy was talking about. We have a 2011 F10 528i and it definitely has the 8 speed auto.

Our 528i already has ~30,000 miles on it so I can say I'm very familiar with it, after testing the new N20 I would gladly trade our 2011 for the new 2012.
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      04-27-2012, 06:41 AM   #40
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the intro to this vid is hilarious (the music and graphics) - i feel like i'm in the eighties and somebody is comparing the walkman to the discman....Like ur a chump if u still like the walkman.

One question - why did the N52 only dyno 208 hp at the crank??? must've been at the wheel right?
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      04-27-2012, 08:40 AM   #41
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A 4cyl in a 5 series is just stupid. It might be efficient, but the weight of that car with such a small motor turbo or not is just not for me. I would much rather have a left over 2011 535 M sport.
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      04-27-2012, 08:44 AM   #42
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A 4cyl in a 5 series is just stupid. It might be efficient, but the weight of that car with such a small motor turbo or not is just not for me. I would much rather have a left over 2011 535 M sport.
What is it you don't understand? It has more power in every measurable way. The weight of the car is irrelevant.
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      04-27-2012, 08:47 AM   #43
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What is it you don't understand? It has more power in every measurable way. The weight of the car is irrelevant.
You're absolutely right, weight has nothing to do with a cars performance. My mistake. A 4000 lb car should have a 4cyl in it.
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      04-27-2012, 09:25 AM   #44
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A 4cyl in a 5 series is just stupid. It might be efficient, but the weight of that car with such a small motor turbo or not is just not for me. I would much rather have a left over 2011 535 M sport.
I agree, a 4 cyl. $50000 car is not for everyone, me included. Unfortunately, cars in the future have to be more efficient and we all know Americans like super sized cars like their super sized fast food My opinion is that, if I were to buy a 4 cyl. car, its would not be a $50000 BMW. I would just settle for a Honda or something like that. If I were to buy a BMW, I want it to be fast and smooth.
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