Place bacon on cooling rack on foil lined baking sheet. Bake at 400 degrees for 22-25 min.
Mix ground sirloin, whiskey, Worcestershire sauce, cola, garlic powder, onion powder, salt, and pepper in a bowl until just combined. Shape meat mixture into 8 evenly sized, 1-inch thick patties. Make an indentation in the center of each patty with your thumb.
Preheat an outdoor grill or griddle for medium-high heat and lightly oil the grate.
Arrange patties indented side up on preheated grill or griddle. Cook burgers until hot and slightly pink in the center, 3 to 5 minutes per side. Place slice of Cheddar cheese on each burger for the last minute of cooking and top with 2 slices bacon. Place burgers on buns.
Sweet and tangy sauce: Put 1/2 cup brown sugar and 1 cup of ketchup in microwave for a minute and 30 seconds and stir. Spread on buns.