Difference between 5.7 and 6.4 - Dodge Challenger Forum: Challenger & SRT8 Forums
Reply
 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 07-01-2012, 12:18 PM
Senior Member
 
Join Date: Jul 2011
Posts: 489
Thanks: 0
Thanked 1 Time in 1 Post
Feedback Score: 0 reviews
(Thread Starter)
Difference between 5.7 and 6.4

Hello, I have a 2011 RT 5.7 auto. I have only 2 years on my lease left and may get out of it early so I can get into a 6.4 SRT8 auto earlier instead of waiting the two years.

-Is there that much of a difference between my RT and the new SRT8. I have never driven the SRT8 6.4, and would love to know?

-The numbers for my car are 376hp and 404tq. The numbers for the SRT8 are 470hp and 470tq. It is more, but it doesnt seem like a huge difference. It is about 100hp and 70tq more...

thanks
tommasom is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 07-01-2012, 12:28 PM
Senior Member
 
rayzazoo's Avatar
 
Join Date: Jan 2009
Location: In my Challenger
Posts: 4,884
Thanks: 384
Thanked 855 Times in 502 Posts
Feedback Score: 5 reviews
Having owned the R/T, 6.1, and now the 6.4, yes there is a tremendous difference.

Key differences:
- adaptive 3-mode suspension
- Brembo brakes
- engine (yes you will notice a huge difference)


What I would suggest is go test drive a 2012 392. Nothing typed out will be able to explain the driving experience difference.


Sent from my Autoguide iPhone app


2015 376 cu-in SRT S/C Hellcat Torred (Tori 3.0) (ordered; BX)
2012 392 cu-in SRT8 Tungsten (IronMaiden) - 12.847 @ 109.89 mph
2010 370 cu-in SRT8 Torred (Tori 2.0)- 12.604 @ 112.11 mph (Spartan Cam) / 12.817 @ 110.05 mph
2009 345 cu-in R/T Torred (Tori 1.0) - 13.291 @ 103.67 mph

Bolt-On Mod Information

Last edited by rayzazoo; 07-01-2012 at 12:31 PM.
rayzazoo is offline  
#3 (permalink) Old 07-01-2012, 02:05 PM
Senior Member
 
STRONGNUFF's Avatar
 
Join Date: Aug 2011
Location: Hurst Texas
Posts: 340
Thanks: 0
Thanked 3 Times in 3 Posts
Feedback Score: 0 reviews
It's a whole different animal !

Andre

2012 SRT8 Challenger 392 6-speed
Bright Silver Metallic w/Black Stripes
LMI 4" Carbon Fiber CAI
SpeedLogix Catch Can
Resonator Delete (Now it sounds like a Hemi)
DRL's Activated
Webelectric sequential tail lights
STRONGNUFF is offline  
#4 (permalink) Old 07-01-2012, 02:06 PM
Lifetime Premium Member
 
426hemicuda's Avatar
 
Join Date: Feb 2006
Location: Lake Murray, SC
Posts: 1,166
Thanks: 1
Thanked 10 Times in 10 Posts
Feedback Score: 0 reviews
It depends on if the R/T has a 6speed or not and then the mods that have been done...
With my mods, on my '09 R/T 6 speed...I make more RWHP than the 392(I make 417hp on a Dynojet vs. my 364RWHP baseline)and most 392's only make 400ish for RWHP stock with no programming available...I have LESS $ in my R/T than the 392SRT8 costs...even with suspension & brake mods, bolt on engine mods, and programming of the PCM. If I do a VVT Cam and ported heads...I will be close to 500 RWHP...and still be under the cost of the SRT8-392 without supercharging or forging the motor. Just depends on what's important to you and where you want to go...better off buying a used Challenger 6-speed and modding the hell out of it.





426hemicuda is offline  
#5 (permalink) Old 07-01-2012, 02:16 PM
Senior Member
 
R/T_6Speed's Avatar
 
Join Date: Aug 2010
Posts: 1,212
Thanks: 27
Thanked 39 Times in 34 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by tommasom View Post
-The numbers for my car are 376hp and 404tq. The numbers for the SRT8 are 470hp and 470tq. It is more, but it doesnt seem like a huge difference. It is about 100hp and 70tq more...
100hp bump makes quite a difference, you'll have no problem noticing a difference



'10 R/T 6 Speed // Magnuson Supercharged @ 8lbs // Hurst //
Areoforce duals // 0ther warranty voiding parts //
R/T_6Speed is offline  
#6 (permalink) Old 07-01-2012, 02:18 PM
Senior Member
 
SparkChicken's Avatar
 
Join Date: Jan 2009
Posts: 392
Thanks: 7
Thanked 36 Times in 18 Posts
Feedback Score: 0 reviews
The 6.4 is a huge difference. I had a 09' supercharged R/T and my 6.4 is way faster than my old R/T. I also made the switch from a manual to an automatic, because I wanted to do better at the drag strip. The HP numbers don't tell the whole story. The real difference is the torque, which is more than 90 ft/lbs more than the stock 6.1, and makes the 6.4 a beast. This 6.4 comes out of the hole like a rocket compared to my old 5.7. My car just dragged on Friday and got a corrected E.T. of 12.2. The actual E.T. at +2000 Density Altitude was 12.5 with drag radials.

The best suggestion I can make is to test drive a 392 turn off traction control and go WOT on a straight road. Your head will be slammed into the headrest. Judge for yourself.





a few mods in the near future!
SparkChicken is offline  
#7 (permalink) Old 07-01-2012, 02:43 PM
Senior Member
 
Join Date: Nov 2011
Location: Arkansas (displaced from Alaska)
Posts: 101
Thanks: 0
Thanked 4 Times in 2 Posts
Feedback Score: 0 reviews
I'm with all the guys above. I too have had a heavily modded 5.7 with SC and a 6.1, this 392 is awesome. It's just an all around better car than the old RT or 6.1 was/is. HP #'s won 't tell the full story. Hard to tell you without driving it. There are few cars out there that accelerate from a dead stop like this heavy beast. I have a Hennessey Viper and coming out of the whole my 6.4 is there. Different story though once we get above 45mph. All in all this 6.4 is one of the more satisfying cars I've owned. I buy hotrods all the time but this will be one I'm keeping.
Krazyfast11 is offline  
#8 (permalink) Old 07-01-2012, 03:46 PM
Senior Member
 
Join Date: Feb 2012
Location: St. Pete, FL
Posts: 626
Thanks: 188
Thanked 206 Times in 104 Posts
Feedback Score: 1 reviews
Huge difference!

I just traded my 11 rt for a 12 srt...i dont care what anyone says. People say you can take an rt and make it a srt clone by doing suspension and some hp upgrades. Nope I had suspension on my rt and it wasnt nearly as responsive as the srt it. The srt is night and day. Its a completely different animal.
NX91Notch is offline  
#9 (permalink) Old 07-01-2012, 04:13 PM
Senior Member
 
Thundersteel's Avatar
 
Join Date: Dec 2010
Location: Crestucky, FL
Posts: 442
Thanks: 0
Thanked 57 Times in 41 Posts
Feedback Score: 0 reviews
Quote:
What I would suggest is go test drive a 2012 392.
I wish I could! NONE of the dealers around here will let you test drive one until you actually buy one!
Thundersteel is offline  
#10 (permalink) Old 07-01-2012, 04:29 PM
Senior Member
 
Av'sfan's Avatar
 
Join Date: Aug 2010
Location: Colorado Springs CO.
Posts: 382
Thanks: 13
Thanked 16 Times in 14 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by SparkChicken View Post
The 6.4 is a huge difference. I had a 09' supercharged R/T and my 6.4 is way faster than my old R/T. I also made the switch from a manual to an automatic, because I wanted to do better at the drag strip.
Sounds to me you didn't drive a stick very well if it is way faster!!! I would think a supercharged 5.7 should hang pretty easily with a 392!!

Hurst equipped,Tuned by ********* Tuning,180 jet thermo, Corsa Exhaust, Mopar CAI, BT Catch Can
Av'sfan is offline  
Sponsored Links
Advertisement
 
Reply

  Dodge Challenger Forum: Challenger & SRT8 Forums > Model Specific Discussion > Dodge Challenger SRT8 Specific > 6.4L / 392ci (2011 - ?)

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Dodge Challenger Forum: Challenger & SRT8 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Goodbye 6.1 - Hello 6.4 !!! GNorSRT8 6.4L / 392ci (2011 - ?) 42 12-17-2012 08:44 PM
Tuning for 11 5.7 and 6.4 but no 3.6. orrwhat Dodge Challenger SE/SXT Specific 4 11-07-2012 05:37 PM
6.1L vs 6.4L Why the BIG Difference in Performance? Carlwalski General Challenger Discussion 65 07-19-2012 11:33 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome