Hopefully this an acceptable place to put this.

There are new inline six cylinder engines coming out. I suspect that more manufacturers will see the light, and the inline 6 will once again become a common engine design choice.

Mercedes-Benz M256 3l; turbocharged + electrically power blower for immediate throttle response., 48V electrical system, http://autoweek.com/article/technology/w...hen-well-see-it

Jaguar also has a 3l inline 6 coming, likely both gasoline and diesel. Their 2l 4 turbo is offered in 247hp and 295hp variants in the USA; so the 6 could be offered with as much as 440hp.

Chevrolet/GMC announced a all new 3l inline 6 diesel at the Detroit Auto Show for the 2019 full size pickup. It will like be rated at over 250hp and over 450 ft-lbs. (to be ahead of the old Ford and FCA V6 diesels)

Nigel