"We will not have alliance with Congress by compromising on our honour and prestige," the Rajya Sabha member and former union minister told reporters here.
Declining to reveal the number of seats NCP had sought (polls for the 288-seat assembly are due in two months), Patel said, "We have given Congress a proposal and are awaiting response."
Several NCP workers wanted the party to contest on its own to better its chances of winning more seats, he said.
After NCP won double the number of Lok Sabha seats than Congress, the Sharad Pawar-led party's leaders are seeking more seats for assembly polls. In Lok Sabha elections, Congress won two while NCP won four seats in the state.
Senior NCP leaders like deputy chief minister Ajit Pawar have said that NCP should either get half (144) of the seats, or it should go it alone. In 2009, Congress had contested 174 seats and NCP 114.