This may help, found it in a German video:
View attachment 718
Option for HUD, particularly tach size and color.![]()
Thanks, that was the video where I originally got excited. Like the subsequent posts show those translate from german to english as speedometer size and color. It also appears that the 2018 Accord Touring HUD has a tachometer as well as the 2018 Regal and 2018 Camry. All those cars are much less sporty than a 3.3T Stinger. Depending on how the HUD display is generated, maybe this feature can be added by Kia with a software update for post-2018 model years. That feature should definitely be added for a second gen Stinger if it can't be added to this generation.