I get the following numbers with MetalKids calculator:NB is not working for me, so I guess this is the best place to ask it.
1) A Hardy Infernape with an Attack IV of 21 and 72 EVs in Attack would have a final stat of 241 at level 100
2) The same Infernape with 48 EVs in Attack would have a final stat of 235 at level 100
3) The same Infernape with 8 EVs in Attack would have a final stat of 225
1) 252
2) 246
3) 236
They are better than yours so I hope I'm right...