You’re probably thinking of Skyactiv-X [1] which is kind of hybrid between a normal spark ignition and compression ignition. It’s been in the 3 in Europe for a couple years but never came to the US. I’ve heard it’s a combination of cost and not-great horsepower, plus it runs louder. Basically for a lot more cost you get something inferior to hybrid in a lot of ways.

[1] https://en.m.wikipedia.org/wiki/Skyactiv