No, it's not mine!!
Where do you draw the line, though? Suppose you had a huge massive long drive down the side of your house and wanted to store an artic or a winnebago there. Would you be reasonable to expect the entire street to be left free of parked cars at all times, so that you could manoeuvre it in and out?!
Obviously, I don't know OP's setup, but I wonder if this car being there makes it 100% impossible or just very difficult. If the latter and you can get it out - even if you need to do an Austin Powers along with two people there to guide you - I don't think you can really complain.
Having a driveway (as do we, I hasten to add) is already a (potentially anti-social) privilege, as you effectively get to reserve the equivalent of a parking space on the public road as 24/7 access to your drive. People will claim that they're doing everybody else a favour in having a drive and not needing to take up a space on the road, but in reality, that's exactly what your drive access does - worse so, as nobody else can ever get a fair opportunity to use it.
Folk will often regularly park over their own dropped kerb as well as having the drive, figuring that it's not a problem to block themselves/their household vehicles in, so they end up having both the penny and the bun. I'm not convinced that it's fair to expect others who don't have drives to effectively lose two potential public spaces by demanding the opposite space be kept permanently clear too.
Having said that, I don't suppose it would be too dreadful to move a vehicle a foot or two, if you were able to do so without damaging it at all and still leaving it in a safe, legal space, but it's still taking a huge liberty with somebody else's property.