You start the game with 12 less units than Hungary. Hungary goes first. If Russia wants to make money it has to attack territories back, costing him units, which will die to Germany, making the Hungary attack scarier, not taking territories back means sad money. Hungary makes more money than Russia. It is awesome like that. Hungary is going to get Russia.
Even if you are not as crazy as me and want to do things a bit more conservatively. You are going to outproduce him and if you constantly send more men than Russia produces his way, you will take it eventually.
As long as you buy strait fighters two rounds in advance before you attack the capital, you should be fine.