would my car still crank and run with a blown engine on a Audi A4 Quattro 1.8L?

Leaking plastic flange at the back of the cylinder head is a common problem. If you drove the car until it stopped you may have engine damage. The engine should start and run without coolant to test for rough running and misfires. If it runs smoothly then the coolant leakage must be repaired in order to pressure test the system to determine if there is damage to the cylinder head or head gasket.