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Old 08-21-2011, 11:16 PM   #26
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its more of a 335i alternative, 328 dont have 400 lb/ft of torque.. and 335d is faster in every way than 328i... and more frugal.. and BMW has $3500-$4000 rebates on it all the time..

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Originally Posted by Integra96 View Post
Yes. The 335d is nice and all, but $10,000 higher starting price than a 328i? Please.
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Old 08-22-2011, 10:39 AM   #27
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Interesting! I'll have to drive this thing. I could see it feasible in an X vehicle. I don't however see it as an M5 alternative. Diesels can make power and torque, but the delivery is always non-linear and the response is delayed compared to a gas engine, lessening the fun factor.
I love my 335d, but it's no sports car replacement even chipped, only a fun DD.
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Old 08-22-2011, 10:45 AM   #28
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I would be all over this if it was not an M5. I don't need an 5 series, to big for anything I would ever need.

Now show me something similar in the 3 series and I might look.

However, that said... it should be a hell of a car.
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Old 08-22-2011, 11:06 AM   #29
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Quote:
Originally Posted by HipToBeSquare View Post
Why not use ALL of a turbine's potential, by gear-reducing it's high RPMS down to crank-shaft RPMs, and compound the turbine output directly with the crankshaft, and into the drivetrain.
I'm not really sure what you had in mind here with the gearing, but turbos are completely worthless at such speeds. They don't make any boost. Even with a gearing system of some sort, you need clutches and other bits to allow the turbo(s) to spin at the same rate.

The only thing close to what you are proposing is using a centrifugal supercharger.
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Old 08-22-2011, 01:40 PM   #30
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Quote:
Originally Posted by AVANTI R5 View Post
whats happening in ENickCarBuying
Couldn't find a 4.0RS at sticker so I'm holding on that. Maybe a Scud this fall otherwise wait for a 4.0 to come up. I need a new truck but waiting for the Rover re-design and 8-speed next year unless the X5 comes with the tri-turbo diesel and 8-speed. M5 I'm keeping for now. Been thinking of building a Backdraft Cobra with the Yates FR9 Nascar motor carbed and tuned for 100 octane (have a few stations around). That's all for car buying thoughts for now.

How's the pressurized Cayman?
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Old 08-22-2011, 11:39 PM   #31
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Quote:
Originally Posted by arghx7 View Post
I'm not really sure what you had in mind here with the gearing, but turbos are completely worthless at such speeds. They don't make any boost. Even with a gearing system of some sort, you need clutches and other bits to allow the turbo(s) to spin at the same rate.

The only thing close to what you are proposing is using a centrifugal supercharger.
I think the point went right by you.

I am not talking about the transmission.

I am talking about turbine compounding, AND centrifugal supercharging.

Look up the P38 Lighting's Turbine-Supercharged engine, and you'll see what I mean.

The turbine and compressor are SEPARATE, and individually tied at different rates to the crankshaft of the engine.

If a turbine makes maximum power around 45,000 rpms, it is obviously about 10 times the speed of the crankshaft, at ~4500 rpms.

The turbine doesn't drive the compressor directly, it outputs to a gear. That gear drives a larger diameter gear, which drives another larger diameter gear, to reduce the rpms by a factor of 10, turning high rotational speed into torque. That last reduction gear is on the engine's crankshaft, and adds the turbine's torque with the engine's torque, which then goes to do whatever work, either driving a prop, or driving a transmission, or whatever.

The supercharger, on the other end of the crankshaft, is gear multiplied only 2 or 3 times, or perhaps variably (with a CVT drive, perhaps) to optimize a compressor for high volume at consistent pressure, catering to the engine's input demands, not the turbine's output profile.

The supercharger adds power, at the intake stage as well as generating more heat in the engine, that heat during the exhaust stage which the turbine turns into higher pressure, and kinetic energy, feeding back into the mechanical system, all on a common crankshaft with the pistons, or eccentric shaft with rotors.

The turbine doesn't need to bleed energy to keep from fragging the compressor, or over-boosting the engine, because the turbine is not directly spinning the compressor wheel.

I am only talking about the engine system here, not the rest of the drivetrain.
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Old 08-24-2011, 08:31 AM   #32
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Old 08-24-2011, 11:22 AM   #33
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^that isn't the diesel m5, is it?
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Old 08-24-2011, 12:57 PM   #34
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It better be...listen to how early it's shifting gears.
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Old 08-24-2011, 01:13 PM   #35
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yeah, i think you're right. it sounds like it's shifting at around 6K - way low for a gas //M engine.
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Old 08-24-2011, 04:51 PM   #36
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Quote:
Originally Posted by lil'redwagon View Post
yeah, i think you're right. it sounds like it's shifting at around 6K - way low for a gas //M engine.
Welcome to the new era of turbo M cars... I don't think thats a diesel. I think it's the new gas M5.
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Old 08-24-2011, 06:25 PM   #37
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really? i'd think even with a turbo, they'd get it to rev it to at least 7-7.2K.
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Old 08-24-2011, 11:47 PM   #38
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Quote:
Originally Posted by KoalaSlim View Post
AWD diesel powered 5 series M? What the hell is happening to the world?

Ultimate DD MONSTER?
uhhh +1....thousand, haha.
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Old 08-25-2011, 06:25 PM   #39
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0:32

Redline looks to be around 6600rpm. Wow...

Edit: It's officially 7200rpm.
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Old 08-25-2011, 06:36 PM   #40
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Wish they would bring this:
http://www.alpina-automobiles.com/fi..._B3BiTurbo.pdf
EVO magazine had one as a long-termer. Very nice.
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Old 02-21-2012, 10:44 AM   #41
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Old 02-21-2012, 12:58 PM   #42
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Man, the guy is wringing this thing out! You guys notice the jump in acceleration at each shift when the rpms are reduced. If he would shift earlier I think the car would be faster. There is no power that high in the power band. The gears are also too short.
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Old 02-21-2012, 01:12 PM   #43
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Quote:
Originally Posted by amdmaxx View Post
its more of a 335i alternative, 328 dont have 400 lb/ft of torque.. and 335d is faster in every way than 328i... and more frugal.. and BMW has $3500-$4000 rebates on it all the time..
Not sure I agree. First off, the new 328 should be about as fast than the 335d. Looks to be making about 250-260 HP, and is lighter.

The 335d pretty much spits the difference between the current N/A 328 and the 335 in terms of acceleration.

So, while it's a closer alternative to the 335 on price, on performance, well, it doesn't necessarily line up that way and isn't considered a good performance value compared to the rest of the line-up.

Last edited by REX8; 02-21-2012 at 01:20 PM.
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Old 02-21-2012, 01:56 PM   #44
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I disagree as I own one and can tell you the numbers don't tell the whole story.
The diesel has a very strong midrange punch. It is slightly slower in acceleration tests than the 335i, but much faster than the 328i. It is a 335i alternative as it was designed to be.
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Old 02-21-2012, 02:07 PM   #45
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Quote:
Originally Posted by HIREN View Post
It is slightly slower in acceleration tests than the 335i, but much faster than the 328i. It is a 335i alternative as it was designed to be.
That's a complete lie.

In fact, it's even slightly CLOSER TO THE 328 than the 335i.

It feels faster than it is, torque will do that. It's only 260 horses. While it has great midrange punch, which makes it good fun to drive, and very punchy...

When it comes to acceleration, yes, the numbers tell the story, and they don't lie, and you can't disagree with them.

All from Car and Driver's latest tests of each car:

335d:

Zero to 60 mph: 5.7 sec
Zero to 100 mph: 14.2 sec
Zero to 120 mph: 21.8 sec
Street start, 5–60 mph: 6.5 sec
Standing -mile: 14.2 sec @ 100 mph

328i:

0-60: 5.9 (two tenths faster to 60 is "much faster"?)
0-100: 16.1 (+1.9)
0-120: 24.9 (+3.1)
5-60: 6.4 (-.1)
1/4: 14.6 @ 96 (+.4 and 4 mph)

335i:

0-60: 4.9 (-.8)
0-100: 12.1 (-2.1)
NO 0-120 in this test
5-60: 5.8 (-.7)
1/4: 13.6 @ 105



Sorry, the 335d is much more than "slightly" slower than the 335i, and is certainly not "much faster" than the 328. If anything, it's in fact more accurate to say it's slightly faster than the 328 and much slower than the 335i.

As just about every review of the car states, while the midrange is great fun, from a performance standpoint, it is most certainly not a bargain compared to the other gas burners in the lineup.

Last edited by REX8; 02-21-2012 at 02:52 PM.
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Old 02-21-2012, 06:23 PM   #46
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Looks like we got a magazine racer folks.
Times vary between tests, especially if they don't launch in 2nd gear with the diesel.

Quote:
Originally Posted by REX8 View Post
If anything, it's in fact more accurate to say it's slightly faster than the 328 and much slower than the 335i.
Clearly you haven't driven any of these cars.

Either way I should edit my previous statement and add that the 335d feels slightly slower than the 335i and considerably faster than the 328i. Something the numbers don't really show unless you look at top gear pulls.
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Old 02-22-2012, 01:03 AM   #47
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They removed my comment about shifting earlier on that youtube video! WTF!
I had 9 thumbs up!
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Old 02-22-2012, 08:42 AM   #48
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Quote:
Originally Posted by HIREN View Post
Clearly you haven't driven any of these cars.

Either way I should edit my previous statement and add that the 335d feels slightly slower than the 335i and considerably faster than the 328i. Something the numbers don't really show unless you look at top gear pulls.
Have you driven the new 328i? You realize it's a turbocharged motor now, right?
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Old 02-22-2012, 09:12 AM   #49
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I for one am very excited about the prospects of the 328i, right up until I option one out to include what I think a nice adult sporty sedan should include. The 328i is great, but no way on earth is it worth near 50k dollars. I would eat my own shoe and buy an ATS for far less.

But this is about Diesel powered cars right. I have NEVER driven one. Ever. But I would be intrigued about how it would feel.
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Old 02-22-2012, 10:21 AM   #50
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http://www.zeroto60times.com/BMW-Bim...mph-Times.html
2012 BMW 328i Sedan (Manual) 0-60 mph 5.5 Quarter Mile 14.1

http://autos.aol.com/cars-BMW-328-2012/expert-review/
328i 0 to 60 mph time of 6.3 seconds
335d sedan 0-60 mph in 6.0 seconds

So times vary. Im guessing the faster times involve clutch dropping action. Something not done out of the track.
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