Contradiction with Matthew 10:5-6
These verses describe Jesus instructing his disciples not to go to the Gentiles or Samaritans, while Romans 15:25 shows Paul ministering to Gentiles.
Matthew 10:5-6: These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into [any] city of the Samaritans enter ye not:
Contradiction with Galatians 2:9
This verse shows an agreement where Paul is to go to the Gentiles and Peter to the Jews, whereas Romans 15:25 has Paul focusing on ministering to the saints in Jerusalem.
Galatians 2:9: And when James, Cephas, and John, who seemed to be pillars, perceived the grace that was given unto me, they gave to me and Barnabas the right hands of fellowship; that we [should go] unto the heathen, and they unto the circumcision.
Contradiction with Acts 21:12-14
Paul is warned not to go to Jerusalem because of impending danger, contradicting Romans 15:25, where Paul is determined to go there to minister.
Acts 21:12-14: And when we heard these things, both we, and they of that place, besought him not to go up to Jerusalem.
Contradiction with James 2:1-4
These verses emphasize not showing favoritism, while Romans 15:25 focuses on preferentially ministering to the saints in Jerusalem.
James 2:1-4: My brethren, have not the faith of our Lord Jesus Christ, [the Lord] of glory, with respect of persons.