Colin1
Senior Master Sergeant
The Luftwaffe shot them down in drovespretty sure the weight of fire of many german aircraft is superior to 6 - 8 .50s and by all accounts the IL2 was very difficult to bring down ...
what the Luftwaffe couldn't do was shoot them down in enough droves
There's only so much armour you can sling around an aircraft before it becomes a barge hauling scrap iron - with all of the inherent handling characteristics.
I don't know how the P-51 would have fared against the Il-2 but I'm pretty certain in a fighter vs Il-2 scenario the weight of fire of the cannon-armed German bird would have weighed heavily in its favour vs the P-51's chances against the same aircraft.