Fiat/Chrysler is working on a new 3.0 turbocharged 6 cylinder line that will produce as much horsepower as a 5.7 Hemi. Supposedly, it will be a slant 6 and will debut in the upcoming rebooted Jeep Wagoneer and, possibly, in the new Challenger. https://www.foxnews.com/auto/is-fiat-chrysler-lining-up-a-return-of-the-slant-6
You cannot trust anything that Fox News says - political or otherwise. That is so not true. Look at the engines offered for the new Jeep Gladiator pickup, that is the future. If they are not lieing, then it is way way in the future.
Why? You can't get out of a 4 or 6 what you can with a V-8. It will never happen. You can turbo charge it, super charge it, or even tie another hamster to it, but it will never do what a v-8 can do. Why we keep going through this I will never know. Make the v-8 and leave it alone, that's my opinion.
It's all about CAFE and fleet mileage. A high-tech, light weight four or six cylinder engine is just more economical than a V-8.
I can neither confirm or deny in a public forum that an inline 6 is in the works. However, it stands to reason that an aluminum block with less cylinders and a couple of power adders will have just as much, if not more, horsepower and torque, while making less emissions and better fuel economy is desirable for the company when the emissions standards and CAFE standards are going to be tightened soon. However, the word HEMI means a lot to a lot of folks....
I cannot imagine them bringing back the Slant Six. I had a '64 Dodge wagon work car back about '74 that had this engine in it and it was a good choice for what it was. I seem to remember Dodge claiming that the engine was built at a slant to help compensate for the torque put out thereby making it run smoother than other straight 6 designs. I knew lots of people that had the 225 cid Slant Six in their cars back in the day. The engine even made it into the Challenger among other designs. I have seen older model Jeep CJs modified to accept this engine and it made a good choice in the CJ as a replacement engine......just do not try to win a race in it but it worked well as far as low end torque goes on a jeep trail and it would get you down the highway. There may still be a few of these conversions around here in Colorado. As good as an engine design as it was, it would be a real relic in a modern car today.....kind of like Chevy putting a new fuel injected 283 cid V8 in a new SS Camaro.....as good as an engine as it was and it got a lot of attention and respect on street and strip when GM made it an option in the '57 Bel Air. I think that my age is showing.
If a 3.0 slant six is used in a future Dodge, Jeep or Chrysler vehicle, it would have very little similarity to its anemic ancestor from the early 1960s. Rather, it will be a modern, high-tech turbocharged engine putting out over 370 hp.