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Engine difference between SDV6 D4 and RRS?
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Space Cadet
 


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Engine difference between SDV6 D4 and RRS?

I couldn’t see that this had been covered before, would’ve assumed it had...

The D4 is 255bhp, but the RRS is 306, is the difference hardware or just software??
  
Post #189560930th Dec 2017 10:35 pm
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galwaygreen
 


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about £30k grand.....correct me if wrong
  
Post #189563031st Dec 2017 12:02 am
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beanie
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Software , you can remap a D4 up to 300 if you really need it Thumbs Up
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Post #189563231st Dec 2017 12:16 am
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lynalldiscovery
 


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Re: Engine difference between SDV6 D4 and RRS?

Space Cadet wrote:
I couldn’t see that this had been covered before, would’ve assumed it had...

The D4 is 255bhp, but the RRS is 306, is the difference hardware or just software??


RRS possibly the 3.6 v8 rather than the 3.0 v6?
  
Post #189563631st Dec 2017 1:03 am
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garrycol
 


Member Since: 06 Dec 2010
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The D4 SDV6 3.0 and the 3.0 in the L320 (Series 2) RRS will be the same with the same tune.

The RRS (L494) 3.0 may very well be different and will be down to tuning as there are differing specs in the L494.

So you need to specifiy which RRS you are talking about.
  
Post #189564531st Dec 2017 2:51 am
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Dave T
 


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so if it's the same engine but mapped to produce more power, and because of that I would have thought a lot lore stress, are RRS engines snapping cranks at an even more alarming rate?
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Post #189565031st Dec 2017 7:39 am
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garrycol
 


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You can also check the different incidences of damage between D4 3.0 TDV6 and the D4 3.0 SDV6 - same engine, different tune in the same model vehicle.
  
Post #189565631st Dec 2017 8:25 am
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Space Cadet
 


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Thanks, I was of course referring to the assumed identical 3.0 V6 in both cars (the V8 in the RRS is about 350bhp I think).

(.....£30k difference for an engine sounds a lot!!!)

The RRS engine gets mapped from 300-odd to circa 350, but the D4 from 250-odd to circa 300bhp, I just wondered why there was such a big difference, surely can’t just be mapping??

Injectors, larger turbos??....
  
Post #189567931st Dec 2017 9:25 am
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Disco_Mikey
 


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Dave T wrote:
so if it's the same engine but mapped to produce more power, and because of that I would have thought a lot lore stress, are RRS engines snapping cranks at an even more alarming rate?


Not unheard of, but there has been the odd failures reported...
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Post #189568331st Dec 2017 9:36 am
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Disco_Mikey
 


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FWIW, the short block is the same part number between D4 and the new RRS...
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Post #189568531st Dec 2017 9:40 am
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dgardel
 


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Yes difference is only done by ECU, engine hardware IS THE SAME!!!!
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Post #189574931st Dec 2017 12:11 pm
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Space Cadet
 


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United Kingdom 2014 Discovery 4 3.0 SDV6 XS Auto Santorini BlackDiscovery 4

So, the SDV6 should be able to be mapped to 350bhp (or whatever it is the RRS is)......
  
Post #189577031st Dec 2017 1:14 pm
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riverblanche
 


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Hi,
Believe it's the software Thumbs Up
The FFRR 3.0 is the same as the D4, but you could always go for the 4.4 Whistle
the RRS can be 292 then changed to 306
I think the £30k you would be getting the dynamic as well so more electrickery and a rear locking diff Smile

Different markets that L/R can choice what to give you and then more noticeable between the engines for the same model, if the 306 3.0 was in the FFRR who would go for the 4.4?

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Post #189577131st Dec 2017 1:14 pm
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