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Mopar’s amazing new Hurricane Four engine with racing tech, high output, and heavy-duty construction
Oct 29, 2025
Inside the cool new Hurricane 4 (GME 2.0 EVO) engine from Stellantis
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0:00
The new 2 L Stalantis engine is a major
0:02
move forward using lessons from the
0:04
first global medium engine and the
0:06
Hurricane 6 and combining them with
0:08
Maserati's efforts. It combines the
0:10
skills of engineers formerly at
0:12
Chrysler, Fiat, Pujo, and Maserati. And
0:15
probably there's some Ferrari in there,
0:17
too. First, let's look at the numbers.
0:19
In the Grand Cherokee, it seems to get
0:21
an extra 1 m per gallon over the V6
0:24
running on regular gasoline. Yet, it
0:26
provides 324 horsepower and 332 pound-
0:31
feet of torque, considerably more than
0:33
the V6. What's more, the peak torque is
0:36
good from 300 to 4,500 RPM. Some of the
0:40
new technology includes a variable
0:42
geometry turbocharger, which was first
0:44
used by Chrysler in the 1991 Spirit RT,
0:48
but is now quite common. The most
0:50
unusual feature is turbulent jet
0:53
ignition, which lights a little fuel in
0:55
a pre-chamber at top each cylinder. That
0:57
burning fuel jets into the chamber,
0:59
triggering a fast complete burn,
1:01
increasing both performance and
1:03
efficiency. The engineers combine that
1:05
with a Miller cycle, which closes intake
1:07
valves early, locking in the power and
1:09
reducing emissions, and allowing an
1:11
absurdly high 12.1 compression ratio
1:14
without knock on regular fuel. 121 is
1:17
quite impressive for a turbo engine on
1:19
regular gas. The Hurricane has twin
1:21
spark plugs, one for the jet chamber and
1:23
one is for the main combustion chamber.
1:26
That makes it quite different from the
1:27
Hemi V8 or old Alfa Romeo twin spark
1:30
systems. Many people are afraid of
1:32
direct injection because early direct
1:34
injection engines tended to carbon up
1:36
and fail. The solution to that has been
1:38
known for years using port fuel
1:40
injection as well. This engine uses both
1:42
with 5,76
1:44
PSI direct injection and port injection
1:47
alike. Both are used on cold starts and
1:49
typical power loads, but at low load and
1:52
idle, they only use port injection,
1:54
which cuts particulates and noise. The
1:56
turbocharger delivers a nice 35 PSI,
2:00
which is 2.4 bar. Just one turbocharger
2:03
is used instead of two with the
2:05
Hurricane 6. It provides 90% of peak
2:08
torque from 2600 to 5600 RPM, which
2:12
means you have more torque at 2600 RPM
2:16
than the Pennar V6 has at peak. As you
2:19
would expect, there is a charge air
2:20
cooler, which people often and wrongly
2:23
call an intercooler. The water pump is
2:25
electrical and the oil pump has variable
2:27
displacement to avoid parasitic losses.
2:30
Even the variable valve timing is
2:32
controlled by an electric camshaft
2:34
phaser. The block is nice and strong. A
2:36
diecast deep skirt aluminum singlepiece
2:39
casting produced by Stalantis. Bore
2:41
walls are 24% thicker than in the first
2:44
GME 2 L 4-cylinder. And there are
2:46
numerous other features which increase
2:48
stiffness and durability. Sodium filled
2:51
exhaust valves, for example, go way back
2:53
to early Chrysler truck engines. This
2:56
engine is meant to last, which is good
2:58
because it is rated for over 6,000 lb of
3:01
towing in the Jeep Grand Cherokee. The
3:03
engine is made in Dundee, Michigan and
3:05
will also be made in Cookamo,
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