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Discussion Starter · #1 · (Edited)
Since I've been comparing the two a lot lately trying to make a decision, I've been doing my research. We all know people on the board have gotten better numbers with both engines out of the box, but here is the breakdown of the 6.1L vs 6.4L using Motortrends test data. Sure the 392 has more usuable torque and drives a little smaller, but the numbers are surprisingly similar.
2008 (auto), 2010 (6spd), 2011 392 (6spd)
0-60 4.7, 4.8, 4.6
1/4 13.1, 13.3, 13.0
60-0 braking 117ft, 113ft, 117 ft
Figure 8 26.4 sec/.69g, 25.7 sec/.71g, 25.6 sec/.70g
Lateral Grip .87g, .92g, .89g
 

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I'm not buying the 1/4 mile differences. They are much greater in my experience. At Infineon Raceway I've seen lots of stock SRT8s and about the best they can get is 13.1 I've know a stock 392 auto ran 12.44 there. A 392 6-speed is going to be slower than an auto
 

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Comparing my old '09 SRT8 to the new 392 (clocked with the 0-60 timer) using the same road, same conditions, same launch techique, etc. I'm finding that "I" am able to reach 60mph (as indicated by EVIC) about a FULL second faster than before.

Truly scientific, NO! But something to ponder...
 

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One magazine has posted a 12.6, can't remember which though. The 392 has power everywhere which the 6.1 only makes power mid too uptop. Comparing magazines is not a good thing to go off, especially since the test were done on different days. Best stock 392 time I've seen so far is a 12.3X, while the best stock 6.1 time I've seen is 12.8X. And I can almost bet that the 12.3 was done in worse conditions than the 12.8
 

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I believe that car was an auto that 12.44. Still that's a good 1/2 second.
You're correct, it was an auto and it had a 1.8s 60'ft.

Numbers tell one story but the real one comes from test driving the 6.1L and then test driving the 6.4L.

I'd say if you're looking at the 6.4L, get a 2012 and not a 2011. They are adding the 2-mode dampening system to the suspension setup for 2012. The suspension changes from 2010 to 2012 make it worth getting a 2012.

Even so, a 6.1L will still put a smile on your face, you'll still enjoy the fun drive and it might be the most cost savy way to go.
 

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I cannot compare my new 2011 SRT8 to any other MY SRT8 but I can compare it to my SRT10 Ram. The SRT8 is a god damn rocket ship and would pull my srt10 NO problem of which my SRT10 had no issues with < 2011 SRT8's until about 115-120 where I became a brick wall.

My SRT10 was purely stock except for the mopar cat back and any srt8 I ran against I can only assume was stock as well.

I am not taking anything away from the 6.1s but from my experience, the 6.4 is down right faster!
 

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Discussion Starter · #10 ·
I have test driven them both, and the 392 definitely is more lively with more torque down low. The steering feel is also better since the ratio is tighter. The car feels about as flat in the turns as before, and braking feels the same. The new steering wheel is a step in the right direction. Overall, an improvement on the SRT name. The 2010 colors are better though, and they are selling in the mid 30s not the mid 40s. If money was no object, I'd get a 392. The deals are the 2010s are just too enticing though.
 

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I've been tracking the magazine tests as well; the 6 speed 6.1s are reported to be running 13.3 - 13.6 @ 104-106, while the autos 13.1-13.2 @ 107-108. For the 392s, 12.9-13.0 @ 111-113 for the 6 speeds, and so far (InsideLine) 12.6 @ 112 for the autos. So the 392 is 1/2 second and 5 - 6 mph faster in the 1/4 mile than the 6.1. And this is despite the 392 cars weighing ~100 lbs more.
 

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If I were buying today, I'd get a 392. That's if you want to stay stock.

The 6.1 is the best for those who want to mod. No mods yet for the 6.4 - but even when the tunes are cracked there is the issue with 5.7 and 6.4 of the VVT. Sky is the limit for power adders for the 6.1s.
 
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