The coldest I've had is my 2014 Tahoe. When I first got it from auction, it was overfilled with refrigerant and wouldn't cool right at all. Found a leaking Schrader valve on the low side as the reason for someone overcharging it. Replaced the valve, pulled a good vacuum, recharged with the correct amount of r-134a.
The little electronic temp gauge I put in it showed -4°F while going 70 mph down the highway on a 85° day. I had to check and make sure it wasn't set at Celsius, because I've never seen an A/C that cold.
My 2019 F150 with the r-1234yf would get down to 10°F
My 2015 F150 with r-134a gets to 25-30°F
I gotta check the Crown Vic, but I know it's extremely cold.
In general, I've always thought Ford heat and A/C was best overall. Haven't been impressed with Nissan and Dodge. Toyota and Honda have always done well for me.