1999 SAAB 9-5 Blown headgasket or cracked head?

I have a 99 saab 95 turbo that I am trying to fix, the tank on the drivers side of the radiator blew out. The tank didn't just crack, it almost broke in half, just under the upper radiator hose. Before I replaced the radiator I checked the cylinder compression ratios and found #1 at 80, #2 at 65, #3 at 45, and #4 at 85. All cylinders held pressure and never leaked down like I thought would happen if the head cracked and over pressurized the cooling system. I went ahead and replaced the radiator, system hold pressure and oil shows no signs of coolant in it.
I have tried to start the car, but it will not run. It's sound like it's firing but it just doesn't want to catch and run on it's own. Will a cylinder still hold pressure with a blown head gasket or cracked head?