520d vs 525d

CraigUK · 11-22-2014, 05:17 AM

Just a quick post to ask if anyone has taken the time to research what if any hardware differences there are between the 520d and 525d, presumably it's more than just a different engine map?

The Beast · 11-22-2014, 06:36 AM

I'm pretty sure that the 525 is a twin turbo

Hobbe74 · 11-22-2014, 06:47 AM

Both are twin scroll but not twin turbo. Id go for the 520d and a tuning box.

HighlandPete · 11-22-2014, 06:56 AM

If we are talking about the N series engines we have a single VNT/VGT turbo on the 520d and sequential bi-turbos on the 525d.

Turbo setups like comparing a 530d to a 535d.

HighlandPete

CraigUK · 11-22-2014, 10:40 AM

Thanks all, for some reason I was thinking that they both have twin scroll turbos.

The reason I asked is that I noticed both Hartge and Steinbauer are both quoting outputs comparable to a standard 525D from their tuning boxes.

ZeroFx · 11-22-2014, 01:26 PM

Quote:

Originally Posted by CraigUK

Thanks all, for some reason I was thinking that they both have twin scroll turbos.

The reason I asked is that I noticed both Hartge and Steinbauer are both quoting outputs comparable to a standard 525D from their tuning boxes.

Yes you can also tune the 525 though

gspannu · 11-22-2014, 05:17 PM

Quote:

Originally Posted by HighlandPete

If we are talking about the N series engines we have a single VNT/VGT turbo on the 520d and sequential bi-turbos on the 525d.

Turbo setups like comparing a 530d to a 535d.

HighlandPete

Absolutely correct, thanks Highland Pete.

BMW's naming conventions or their terminology (twin scroll, twin turbo, etc...) does not really make it easy to understand any of this !

HighlandPete · 11-22-2014, 05:41 PM

Quote:

Originally Posted by gspannu

BMW's naming conventions or their terminology (twin scroll, twin turbo, etc...) does not really make it easy to understand any of this !

Particularly as twin scroll is now often confusing used, (but only applies to the petrol engines) and Twin Power on engine covers, even for single turbo diesel engines.

Twin Power means different things for different engine types according to BMW blurb.

HighlandPete

Hobbe74 · 11-24-2014, 07:11 AM

Quote:

Originally Posted by HighlandPete

If we are talking about the N series engines we have a single VNT/VGT turbo on the 520d and sequential bi-turbos on the 525d.

Turbo setups like comparing a 530d to a 535d.

HighlandPete

Thanks a lot for that input!

It's rather confusing in the tech spec:
They use the term twin power turbo engine with variable turbine geometry for the 520d and twin power turbo engine and two-stage turbocharger with variable turbine geometry for the 525d...

Not all that clear that it is two turbos so thanks again.

makkan00 · 11-24-2014, 02:46 PM

Is pre-LCI 330d twin turbo as well?

HighlandPete · 11-24-2014, 03:04 PM

Quote:

Originally Posted by makkan00

Is pre-LCI 330d twin turbo as well?

No single VHT/VGT turbo, the 335d was sequential bi-turbos.

HighlandPete

makkan00 · 11-24-2014, 03:12 PM

Quote:

Originally Posted by HighlandPete

No single VHT/VGT turbo, the 335d was sequential bi-turbos.

HighlandPete

Quote:

Originally Posted by HighlandPete

If we are talking about the N series engines we have a single VNT/VGT turbo on the 520d and sequential bi-turbos on the 525d.

Turbo setups like comparing a 530d to a 535d.

HighlandPete

Sorry. Just to clarify
Pre-LCI 525/530d is single turbo like 325/330d.
LCI 525/530d is twin turbos like 335d? (if twin turbo = sequential bi-turbos)
Are they not n57 engines if you are referring 'N' to N57 engines?

CraigUK · 11-24-2014, 03:16 PM

The latest 525D is a 4 pot with two turbos where as the old 525d was a 6 pot motor with one turbo. The 530d has one turbo too.

HighlandPete · 11-24-2014, 03:31 PM

Quote:

Originally Posted by makkan00

Are they not n57 engines if you are referring 'N' to N57 engines?

4-cylinder engines are N47 variants, the 525d being an N47S1. 6-cylinder are N57 variants. To confuse it all, latest 520d is a B series engine.

HighlandPete

makkan00 · 11-25-2014, 01:14 AM

Make perfect sense now except B engines

11-22-2014, 05:17 AM	#1
CraigUK Captain 126 Rep 641 Posts Drives: F11 LCI 520D Sport Tourer Join Date: Jan 2009 Location: Durham iTrader: (0)	520d vs 525d Just a quick post to ask if anyone has taken the time to research what if any hardware differences there are between the 520d and 525d, presumably it's more than just a different engine map?
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11-22-2014, 06:36 AM	#2
The Beast Lieutenant Colonel 268 Rep 1,597 Posts Drives: VW Transporter Sportline Join Date: Aug 2010 Location: Wolverhampton iTrader: (0)	I'm pretty sure that the 525 is a twin turbo __________________ Current: VW Transporter Sportline, F48 X1 20i M Sport. Previous: F10 530d M Sport, W176 A200 CDI AMG Evolution, E70 X5 3.0 SD M Sport, F20 120d M Sport, E81 120d M Sport, E46 325i M Sport, E46 318ci & Many Others...
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11-22-2014, 06:47 AM	#3
Hobbe74 Private First Class 15 Rep 165 Posts Drives: F10 on order Join Date: Oct 2011 Location: Sweden iTrader: (0)	Both are twin scroll but not twin turbo. Id go for the 520d and a tuning box.
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11-22-2014, 06:56 AM	#4
HighlandPete Lieutenant General 6659 Rep 15,858 Posts Drives: BMW F11 535i Touring Join Date: Mar 2007 Location: Scotland, Highland Region iTrader: (0)	If we are talking about the N series engines we have a single VNT/VGT turbo on the 520d and sequential bi-turbos on the 525d. Turbo setups like comparing a 530d to a 535d. HighlandPete
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11-22-2014, 10:40 AM	#5
CraigUK Captain 126 Rep 641 Posts Drives: F11 LCI 520D Sport Tourer Join Date: Jan 2009 Location: Durham iTrader: (0)	Thanks all, for some reason I was thinking that they both have twin scroll turbos. The reason I asked is that I noticed both Hartge and Steinbauer are both quoting outputs comparable to a standard 525D from their tuning boxes.
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11-24-2014, 02:46 PM	#10
makkan00 Major General 886 Rep 9,097 Posts Drives: F83 and F36 Join Date: Dec 2011 Location: Essex iTrader: (56)	Is pre-LCI 330d twin turbo as well? __________________ F36 Xdrive for her - HUD, park assist, heated steering wheel, rear camera, Apple car play F36 RWD for him - HK, M sports pack, GTS tail light, Apple car play
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11-24-2014, 03:16 PM	#13
CraigUK Captain 126 Rep 641 Posts Drives: F11 LCI 520D Sport Tourer Join Date: Jan 2009 Location: Durham iTrader: (0)	The latest 525D is a 4 pot with two turbos where as the old 525d was a 6 pot motor with one turbo. The 530d has one turbo too.
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11-25-2014, 01:14 AM	#15
makkan00 Major General 886 Rep 9,097 Posts Drives: F83 and F36 Join Date: Dec 2011 Location: Essex iTrader: (56)	Make perfect sense now except B engines __________________ F36 Xdrive for her - HUD, park assist, heated steering wheel, rear camera, Apple car play F36 RWD for him - HK, M sports pack, GTS tail light, Apple car play
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