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Acura RDX

2722 messages,  Last post on Sep 25, 2009 at 12:58 PM

You are in the Acura RDX Forum. Your Hosts are steve_ & tidester

What is this discussion about? Acura RDX, Concept Cars, SUV


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#41 of 2722
Re: [varmint] by robertsmx
Jan 07, 2005 (9:18 am)
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Replying to: varmint (Jan 06, 2005 2:56 pm)

In Japanese market (and fuel economy standards), Accord w/2.4 is rated 12 km/liter as is CR-V. With AWD, however, the rating drops a little for CR-V to 11.6 km/liter. The same should translate if V6 were shared between the two (in our case, the Accord is bigger and heavier). And if RDX (or CR-V) were to get 3.0/V6, they could use the same transmission that Accord V6 uses.
 
FWD Vue 3.5/V6 is rated 20 mpg in city (19 mpg with AWD). I assume 3.0/V6 to be fractionally better with and without AWD than 3.5/V6. On highway, I will not be surprised to see 28 mpg (compared to Accord V6’s 30 mpg), although 27 mpg can be a safer bet with AWD. Even if it were to get 19 mpg with AWD (like Vue’s 3.5/V6), VCM could make it 20 mpg in city (like Odyssey’s 3.5/V6 which is a 4600 lb vehicle).
 
Honda could slightly detune the 3.0/V6 for its light truck application like it has done for Odyssey, Pilot and MDX for peak power to arrive earlier with a lower redline. This can translate to lower peak power output, however (220-230 HP).
 
EPA standard also provides for a (relatively) wide range of curb weight within a model for it to be assumed within the same class not requiring a separate test, and I believe that range is something like 250 lb. Greater impact on fuel economy will come from curb weight and aerodynamics.
#42 of 2722
by kyfdx HOST
Jan 07, 2005 (9:21 am)
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If they are announcing this at the Detroit auto show this weekend, shouldn't there be some good spy pictures of this car? Rather than just some cheesy concept drawings?
 
Also, no one seems to even know if this is a re-done CR-V or not... Any one know for sure?
 
Perhaps I missed this info..
#43 of 2722
by robertsmx
Jan 07, 2005 (9:45 am)
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CRV and RDX could potentially share a platform (new or not). In fact, RDX could tell us a little more about the next CR-V!
 
I expect RDX to be a sportier and luxorious alternative to CR-V (along the lines of MDX/Pilot duo). This could even mean slightly smaller dimensions.
 
With NAIAS, we should be able to see a near production prototype (as has been typical of Acura/Honda in the recent past).
#44 of 2722
Re: [robertsmx] by kyfdx HOST
Jan 07, 2005 (9:49 am)
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Replying to: robertsmx (Jan 07, 2005 9:45 am)

Well.. I would bet that way.. An upgraded CR-V, with a variation on the same 2.4L powerplant... maybe a full-time AWD system..
 
At least that is what I am expecting... I guess we'll know by Monday morning...
#45 of 2722
Re: [robertsmx] by varmint
Jan 07, 2005 (3:08 pm)
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Replying to: robertsmx (Jan 07, 2005 9:18 am)

"In Japanese market (and fuel economy standards), Accord w/2.4 is rated 12 km/liter as is CR-V. With AWD, however, the rating drops a little for CR-V to 11.6 km/liter."
 
In Japan, the Accord is a TSX (smaller than our Accord) and it uses a 2.0L block, if I'm not mistaken. While the JDM CR-V is the same size as ours and uses the 2.4L block. So, unless you meant to be comparing the Inspire, I don't think we have an apples to apples comparison.
 
If you want to compare the Accord 2.4L vs CR-V 2.4L as a basis for estimating how the Accord V6 will do in the CR-V, then just look at the US market selections. The I4 Accord gets 24 mpg city and the CR-V gets 22. That's a 9% difference in fuel economy with 300 lbs of variation in curb weight.
 
BTW, I'm assuming an AWD CR-V because, quite frankly, who cares about a 2WD SUV.
 
If we put the V6 in the current CR-V and assume the same 9% drop in fuel economy, then we can expect a 19 mpg city rating.
 
But that's assuming the next CR-V or RDX does not gain any weight, which I think is a mistake. I think we should expect the weight variance to grow from 300 to at least 500 lbs. And, as you say, a greater impact will come from weight and aerodynamics.
#46 of 2722
Re: [varmint] by robertsmx
Jan 07, 2005 (3:32 pm)
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Replying to: varmint (Jan 07, 2005 3:08 pm)

In Japanese market, Accord is available with K24 (K20 is standard). In CR-V, until this year I believe, K20 was standard, but now K24 is.
 
In the US market, while Accord and CR-V both use K24, the engines are tuned differently (note that Accord gets 160 HP at 5500 rpm compared to CR-V which gets the same at 6000 rpm). But bigger difference is in gearing. CR-V is using one of the shortest gearing of any vehicle around perhaps to compensate for lower torque for its weight and enhance performance at lower speeds.
 
But with 3.0/V6, gearing similar to Accord's V6 would work just fine and that could result in only slightly poorer fuel economy (primarily due to poorer aerodynamics and additional driveline loss due to AWD).
 
At least 19/28 mpg on AWD RDX/CR-V 3.0/V6 is a strong possibility IMO. An interesting part about this, if true, is that EPA fuel economy measurement doesn't account actual use of AWD. They simply chop off a percentage based on assumptions. I read this at their website but a while ago (quoting it as... not all scenarios are possible to simulate).
#47 of 2722
And... by kyfdx HOST
Jan 08, 2005 (1:43 pm)
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If it is a modified CR-V with a V-6 and full-time AWD, I still only see about a 200 LB weight gain.. No point in bringing out a pig that would be 500 lbs. more, if it is CR-V based..
#48 of 2722
proof of concept is out by nowakj66
Jan 09, 2005 (3:39 pm)
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So the proof of concept has been unveiled. Anyone know if it is based on the Accord or CR-V? I see some Toureg, Pacifca and Murano in there, as well as the MDX of course. It looks promising but 2006 is a long time to wait.
#49 of 2722
RD-X concept has SH-AWD! by rsholland
Jan 09, 2005 (3:52 pm)
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http://hondanews.com/CatID3046?mid=2005010956031&mime=asc&amp- ;archives=t
#50 of 2722
The Pictures by jchan2
Jan 09, 2005 (5:52 pm)
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look very nice.

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