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Old 09-13-2008, 01:58 PM   #1 (permalink)
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scenic - '01 renault scenic
90 day: 43.09 mpg (US)

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aerodynamic : 2008 HCH II vs 1997 Renault Megane Classic

This week I was waiting for a colleague in a parking and walked a few minutes. Back to my car I saw I was parked beside a brand new HCH II. Immediately I was surprised by all the similarities with my megane. In fact to go faster, here are the differences I noted :
  • The front is more rounded on the HCH,
  • The front/hood transition is smoother on the HCH,
  • The hood is smaller on the HCH,
  • The lower side is straighter on the HCH and
  • The trunk has a little spoiler.

Here are the characteristics I could found (megane / HCH II) :
length mm : 4129 / 4545
width mm : 1699 / 1750
height mm : 1420 / 1430
weight kg : 1130 / 1297
Cd : 0.32 / ???
FA m² : 1.99 / ???

I can't find HCH II's Cd & FA. If it's better than megane's one then very little can affect the aerodynamic.

Denis.

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Save money & CO2 at home : http://ecorenovator.org/
Created and managed by the creators of http://ecomodder.com/
---
Earth and health are priceless, so are kilotank and AT-PZEV
Best Mégane tank: 1268.9mi @ 77.847 MPG(US)
2008/06-2011/10 saving:
  • 5725.5 kg CO2 (5342.6+382.9)
  • Diesel / Money: 42.17% = 2446.25€ = 3357.26$


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megane : thread - kill switch.
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Old 09-13-2008, 06:59 PM   #2 (permalink)
X-Frenchy: very
 
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Join Date: Jun 2008
Location: Toulouse, France
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scenic - '01 renault scenic
90 day: 43.09 mpg (US)

megane - '97 renault megane classic
Diesel
90 day: 72.53 mpg (US)

dennisius - '06 Toyota Prius
Team Toyota
90 day: 69.27 mpg (US)
Thanks: 9
Thanked 34 Times in 23 Posts
Quote:
Originally Posted by groar View Post
Here are the characteristics I could found (megane / HCH II) :
[...]
Cd : 0.32 / ???
FA m² : 1.99 / ???

I can't find HCH II's Cd & FA. If it's better than megane's one then very little can affect the aerodynamic.
From Automobile drag coefficient - Wikipedia, the free encyclopedia and many other pages, HCH's Cd is 0.27. Not found the Frontal Area, the smallest CdA shown in this page for a Honda Civic is 7.04. With a Cd of 0.27, this is a FA of 26.1 ft² = 2.42 m². This is a lot so it must be a previous Honda Civic with a Cd of 0.31, which corresponds to a FA of 22.7 ft² = 2.11m², closer to my megane's FA of 1.99m².

Whatever the FA, a Cd of 0.27 for such a little difference with my megane which has a Cd of 0.32 is astonishing to me.

Denis.
__________________
Save money & CO2 at home : http://ecorenovator.org/
Created and managed by the creators of http://ecomodder.com/
---
Earth and health are priceless, so are kilotank and AT-PZEV
Best Mégane tank: 1268.9mi @ 77.847 MPG(US)
2008/06-2011/10 saving:
  • 5725.5 kg CO2 (5342.6+382.9)
  • Diesel / Money: 42.17% = 2446.25€ = 3357.26$


---
megane : thread - kill switch.
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Old 02-14-2009, 09:56 AM   #3 (permalink)
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la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.34 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 45.5 mpg (US)

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Where did you find CD for a Megane ?

Looking for it for my break and I don't seem to find anything ...

Thanks in advance.
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Old 02-14-2009, 02:16 PM   #4 (permalink)
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coupe, 4 door ,or 5 door ?
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Old 02-14-2009, 02:47 PM   #5 (permalink)
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Join Date: Jun 2008
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scenic - '01 renault scenic
90 day: 43.09 mpg (US)

megane - '97 renault megane classic
Diesel
90 day: 72.53 mpg (US)

dennisius - '06 Toyota Prius
Team Toyota
90 day: 69.27 mpg (US)
Thanks: 9
Thanked 34 Times in 23 Posts
Quote:
Originally Posted by renault_megane_dci View Post
Where did you find CD for a Megane ?

Looking for it for my break and I don't seem to find anything ...
I found mine in a third part doc (RTA - Revue Technique Automibile). I looked for the wagon version but it isn't present.

On Renault's site this information is present for some cars, but not for the current megane estate.

Less frequently it can be on second hand web sites, but couldn't find it on "la centrale".

chipX, the "break" version is the wagon one : Fichier:Renault Megane Kombi front 20071025.jpg - Wikipédia

Denis.
__________________
Save money & CO2 at home : http://ecorenovator.org/
Created and managed by the creators of http://ecomodder.com/
---
Earth and health are priceless, so are kilotank and AT-PZEV
Best Mégane tank: 1268.9mi @ 77.847 MPG(US)
2008/06-2011/10 saving:
  • 5725.5 kg CO2 (5342.6+382.9)
  • Diesel / Money: 42.17% = 2446.25€ = 3357.26$


---
megane : thread - kill switch.
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Old 02-15-2009, 06:02 AM   #6 (permalink)
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i was talking about the classic ?
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Old 02-15-2009, 07:44 AM   #7 (permalink)
X-Frenchy: very
 
groar's Avatar
 
Join Date: Jun 2008
Location: Toulouse, France
Posts: 595

scenic - '01 renault scenic
90 day: 43.09 mpg (US)

megane - '97 renault megane classic
Diesel
90 day: 72.53 mpg (US)

dennisius - '06 Toyota Prius
Team Toyota
90 day: 69.27 mpg (US)
Thanks: 9
Thanked 34 Times in 23 Posts
Quote:
Originally Posted by chipX View Post
i was talking about the classic ?
My classic is a 4 door : Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com
(currently it doesn't have any aeromod)

Denis.
__________________
Save money & CO2 at home : http://ecorenovator.org/
Created and managed by the creators of http://ecomodder.com/
---
Earth and health are priceless, so are kilotank and AT-PZEV
Best Mégane tank: 1268.9mi @ 77.847 MPG(US)
2008/06-2011/10 saving:
  • 5725.5 kg CO2 (5342.6+382.9)
  • Diesel / Money: 42.17% = 2446.25€ = 3357.26$


---
megane : thread - kill switch.
  Reply With Quote
Old 02-15-2009, 09:06 AM   #8 (permalink)
Master EcoModder
 
Join Date: Feb 2009
Location: France - Paris
Posts: 762

la_voiture_de_courses - '03 Renault Megane Estate
OldContinents
90 day: 44.34 mpg (US)

xiao lan - '01 Audi A2
90 day: 38.88 mpg (US)

Brit iron - '92 Mini Mini
90 day: 45.5 mpg (US)

Prius - '09 Toyota PRIUS Lounge
90 day: 47.37 mpg (US)

Beemer - '06 BMW F800 ST
90 day: 53.06 mpg (US)
Thanks: 188
Thanked 33 Times in 30 Posts
Thanks for the reply

Compared to the picture you linked, mine is the previous one, that one is megane 2.

Much less fuel thirsty in 1.5 Dci by the way !

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