Up next in 10
Mopar Hemi V8: a new end game? (Is this the end of the 5.7 and 392?)
Mar 6, 2026
The various New Hemi V8 rumors and how they come together with today's lineup—and how things might play out
Show More Show Less View Video Transcript
0:00
Hi, this is Dave and I'm here to talk
0:02
about what might be up for the Mopar
0:05
Hemi engine line. And keep in mind that
0:08
we've seen a lot of changes in where and
0:11
how they're made and what purposes they
0:14
have. It's an option where you can get
0:17
it at all and it's much lower production
0:20
than it used to be. Partly because the
0:22
new hurricane came in and kind of took
0:24
that space only one uping it. So, what
0:28
have we got now is we've got the the old
0:31
5.7, the old 392 or 6.4 and the old
0:36
Hellcat. Now, the Hellcat is actually
0:38
kind of new even though it's old, if you
0:40
know what I mean, in engine terms. It's
0:42
still relatively new, and it is still
0:45
pretty much unbeatable in its class. So,
0:48
the Hellcat is not a problem. But, we've
0:52
got rumors that a new 426 Hemi is coming
0:55
out. It's a 7 L engine. that supports
0:57
426. I thought about the possibility
1:00
that we might be seeing a new 413, but
1:02
that 6.8 L and rumors 47. A 426 gives
1:07
you a nice 6.98 L, which rounds up to
1:11
7.0. We're looking at this new engine,
1:14
and that would be replacing the truck
1:16
engine, the truck 6.4, which has kind of
1:19
been uh outclassed in a way by GM and
1:23
Ford. both have engines that can be
1:26
argued are more capable. Uh so it makes
1:30
sense to have a higher displacement
1:32
gasoline engine for the Ram 2500, 3500,
1:35
and the forgotten 4500 and 5500,
1:40
which to be fair have not had a major
1:42
upgrade since they were brought out. But
1:45
then again, in that industry of the
1:48
chassis cabs, you don't need major
1:50
upgrades and uh it actually throws
1:53
things off because the aftermarket
1:54
designs things and they don't want to
1:56
change their designs very often. So,
1:58
stability is good. We've got this and I
2:01
I understand it will be available in a
2:03
high performance version. So, the
2:05
question is why would you still have the
2:08
6.4 truck engine and the 7.0 truck
2:12
engine? They're so close together. Uh,
2:15
it complicates everything. You need
2:16
parts for both. You need to keep both
2:19
supported. You need to test for both.
2:21
That's crash test, emissions test, and
2:23
fuel economy test. Why not just have the
2:27
7 L? And that goes to if you're going to
2:31
have the uh the 392 Hemi, the 6.4 four
2:35
Hemi and the 7 L and the hurricane high
2:38
output. It seems pointless to have all
2:42
those engines. It's too much. So, we've
2:44
gone from years of not enough, now we're
2:46
going to get flooded and it's too much.
2:49
And then you also by having the 7 L 426
2:53
probably outperforming the high output
2:56
hurricane, you wouldn't have this weird
2:58
thing now where people have to pay extra
3:00
to get an engine with lower performance.
3:03
Now, we've seen this before when the 383
3:05
was made into the 400, uh, which was
3:08
originally a cost-saving measure, so
3:10
they could integrate their equipment for
3:13
the RB and the B engines, uh, get the
3:16
dimensions the same and such. And then
3:18
they decided that no, marketing would be
3:21
much more fun with a 400 cubic inch
3:23
engine and I don't remember the exact
3:24
number, like 396 or something. Then uh
3:29
so the 383 once the 400 came out the 383
3:33
was immediately dropped. You didn't have
3:35
both at once and that's the way I expect
3:38
it might end up with the 6.4 four in the
3:40
7 L or if you prefer the 392 and the 426
3:44
cuz we're not in the 70s anymore and we
3:47
don't have a 318 and then a 340 and then
3:51
a 383 and then a 413 and a 440 and a 426
3:56
Hemi on top of all that and not
4:00
necessarily huge gaps in between each
4:02
engine option and each one available
4:04
with a four barrel or a two barrel or
4:07
two four barrels or a six-pack uh three
4:11
two barrels. You know, that that level
4:14
of options has not been around for most
4:18
vehicles for a long time. So, I'm
4:21
thinking that what we'll see is a
4:22
completely renovated Hemi line where a
4:25
compact new 4 L V8 will come in and
4:28
possibly push out the 5.7
4:31
that ends the overlap of the 5.7 and the
4:34
Hurricane.
4:36
And then we have the 426 Hemi replace
4:38
the 392 Hemi and possibly replace the
4:42
Hellcat, although the Hellcat was
4:43
originally slated to continue until, as
4:45
I understand it, roughly 2030 or maybe
4:49
beyond. And you make life easier for
4:51
yourself. Anyway, that would rationalize
4:54
the the lines. It's just having the two
4:56
Hemis, a 4 L and a 7 L. And the 7 L
4:59
would be available as a high
5:01
performance, a ridiculously high
5:03
performance, and a truck engine. or it
5:05
might just be available. We keep the
5:06
Hellcat as it is and then it's a high
5:09
performance
5:10
truck engine and a heavyduty truck
5:13
engine which has lower horsepower
5:15
deliberately so that you get longer
5:17
durability. So, I'll see you soon.
#Autos & Vehicles
#Autos & Vehicles
#Motor Vehicles (By Type)
#Custom & Performance Vehicles