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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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NEW QR25DE Engine Specs
Hi Guys,
With the coming (in October 2007) new xtrail, questions are being raised about the type of engine it will have.
We know for a fact that it will have the existing QR25DE (2.5LT, Petrol) engine but is it the same we currently have in our xtrails or truly refined as Nissan claims?
Research on the net pointed me towards the most obvious source of information and that is the 2007 Nissan Sentra SE-R and SE-R Spec V for obvious reasons. We currently share the same engine with Sentra Spec-V
Below are photos of the new QR25DE engine that is included in the Sentra Spec-V
 
The new QR25DE engine specs as follows:
Type: Inline-4
Displacement cu in (cc) 152 (2500)
Power bhp(kW)at RPM: 200(149)/6600
Torque lb-ft(Nm) at RPM: 244(180)/5200
Redline at RPM: 6800
The 149KW of power is a serious increase to the current Spec-V rating and I would sure love to see that type of power in the new exy 
Here is an extract from a review about the 2007 Sentra Spec-V engine:
quote:
Development of the SE-R engine was guided by Motohiro Matsumura, Chief Vehicle Engineer, who previously led the development of Nissan’s highly acclaimed “VQ” series V6 engine.
Special emphasis was placed on the SE-R Spec V’s new high output version of the QR25DE 4-cylinder engine, with extensive modifications to the top end of the engine developed exclusively for the SE-R Spec V. Among the unique Spec V engine features are use of a unique resin intake manifold and dual branch exhaust manifold; revised piston crown shape to support a higher compression ratio (10.5:1); iridium tipped spark plugs for improved combustion characteristics; and a revised cam shaft profile, reinforced connecting rods and 8-counterweight crankshaft to achieve a higher redline limit of 6,800 rpm.
With these modifications, the power achieved is 200 horsepower at 6,600 rpm and 180 lb-ft of torque at 5,200 rpm (when using premium unleaded fuel). Helping to put all this power to the ground is an optional Helical Limited-Slip Differential (available with Spec V only). The Spec V model is available only with a close-ratio 6-speed manual transmission. It also has unique suspension, brakes, tires and body structure changes (versus the base SE-R).
We now know who is the person responsible for designing the current QR25DE engine in Japan and the screws problems associated with that LOL
Anyway, I would be looking forward with MUCH interest at the engine specs of the new model exy when it is released here.
Here is our existing QR25DE engine (for comparison)
Last edited by jalalski, 24/Apr/2007, 10:51 pm
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20/Apr/2007, 10:51 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: NEW QR25DE Engine Specs
Yep, sorry about that typo, it is 149KW indeed.
No matter what emmission restrictions are put in place, it is good to know that POWER is there to be explored and enjoyed 
Hmmmm, 149KW with the Hi-Tech system could be a killer of an exy on the road. hehehehehe
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20/Apr/2007, 11:05 am
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Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6360
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Re: NEW QR25DE Engine Specs
Jalal,
The new QR25DE already has extractors, albeit with dual cats (one in each pair leg). This would have some contribution to the extra 17kW from the 132kW of our Series 1 so I think the only gains now might be from a better the muffler.
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog |
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21/Apr/2007, 7:23 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: NEW QR25DE Engine Specs
Kev,
Having cat. converters as part of the manifold/headers will always introduce restrictions when compared to a high flow cat. that is positioned separately.
The only good side of these new cat. converters (if what am seeing is correct) they look to be made of stainless steel (so, no more flaking issues)
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21/Apr/2007, 7:55 am
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: NEW QR25DE Engine Specs
Looks like we will not get the full power with the new (refined) QR25DE engine as part of the new model exy.
Here are the specs of the 2.5LT petrol engine that we will get
2.5-litre 124kW (169hp)
peak torque is 233Nm
So, in terms of power the new exy will be the same as the 2006 models and up
Look at the bright side, there is at least 25KW of power hidden in the exy which will be interesting to explore LOL
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29/Apr/2007, 5:58 pm
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johnsey
X-TRAIL FANATIC
Date Registered: 01-2007
Location: Melbourne, Wantirna
TOTAL POSTS: 435
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Re: NEW QR25DE Engine Specs
Unfortunaletly there still no mention of the new model in diesel for OZ. This months 4x4 Aus mag mentions the new model with the same engine as already outlined.
I know of 2 potential Xtrail buyers who would be sure to get the new shape in diesel!! Just think of those extra newtons coming in handy in track conditions, it gives me goosebumps.
---
Xcited Touring
Series 2 2005 ST Auto, nudge bar, driving lights, spoiler, GME 3100 UHF, towbar , bashplate, Yokohama Geolander AT-S and Kings Springs lift X495 (c)
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29/Apr/2007, 8:52 pm
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Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6360
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Re: NEW QR25DE Engine Specs
OK so here is a thought ...
I wonder if the "new piston with the revised crown shape to give 10.5:1 compression ratio" might fit our QR25DE to extract a bit more power ?
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog |
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29/Apr/2007, 8:56 pm
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: NEW QR25DE Engine Specs
quote:
johnsey wrote:
Unfortunaletly there still no mention of the new model in diesel for OZ. This months 4x4 Aus mag mentions the new model with the same engine as already outlined.
Diesel is not on the cards for first wave of the launch.
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29/Apr/2007, 9:39 pm
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It is 149kw which is still a healthy increase even over what we had in the series I & II. However, by the time they make it compliant with Aus emissions it will probably be lower. 
