Unfortunately for HEMI enthusiasts, pretty much all of them are going the way of the dodo. The 2025 model year Ram 1500 TRX, for example, is getting the Hurricane twin-turbo sixer. There's also talk about Chrysler keeping the 6.4 alive for heavy-duty applications exclusively, but only time will tell whether the Ram HD is going Cummins exclusive or soldier on with both the Cummins and 6.4er.
According to an order guide published by Stellantis North America (a.k.a. FCA US LLC, a.k.a. Chrysler), the Jeep Wagoneer is bidding farewell to the 5.7-liter HEMI engines after model year 2023. Attached below, the order guide for 2024 lists the 3.0-liter Hurricane in standard-output flavor. Hurricane SO means 420 horsepower at 5,200 revolutions per minute and 468 pound-feet (635 Nm) at 3,500 revolutions per minute, numbers that are much superior to the naturally-aspirated 5.7er.
Chrysler hasn't uploaded the 2024 order guide for the Grand Wagoneer, although we already know that it comes with the 6.4-liter HEMI and high-output version of the 3.0-liter Hurricane. As per the Environmental Protection Agency, the four-wheel-drive 2024 Jeep Grand Wagoneer averages 15 miles per gallon (15.7 liters per 100 kilometers) on the combined test cycle with the naturally-aspirated V8. By comparison, the sixer improves to 17 miles per gallon (13.8 liters per 100 kilometers).
The ratings are understandably better in the Wagoneer's case: 19 miles per gallon (12.4 liters per 100 kilometers) with four-wheel drive and 20 miles per gallon (11.8 liters per 100 kilometers) with rear-wheel drive. Truth be told, you'll find it hard to reach said estimates in real-world conditions.
Why is Chrysler getting rid of the HEMI, though? Most likely, the Auburn Hills-based automaker is getting tired of paying millions over millions to Tesla for so-called regulatory credits. The increasingly draconic rush to improve fuel efficiency is attributed to CAFE requirements. More specifically, the fleet average is 49 mpg (4.8 l/100 km) by 2026.
Ambitious? It surely is, but on the other hand, what can automakers do except for pleasing the lawmakers? The situation isn't rosy in the Old Continent either, with Euro 7 famously described as a de facto ban on the sale of new fossil-fuel vehicles due to the high costs associated with modifying existing powerplants to meet Euro 7 targets.