"And when the day of Pentecost was fully come, they were all with one accord in one place." --Acts 2:1 KJV
The Greek word translated as "one accord" is "autos." However, I don't think it means the Honda Accord. I am convinced it means His accord -- the unity that Christ-followers have in and through the risen Jesus. In English, to be of "one accord" means "to be harmonious with one another," "to be united or in sync."
"And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting." --Acts 2:2 KJV. The heart-connected unity of those first believers released a supernatural presence and power. Then all 120 of the them flooded into the crowded streets of Jerusalem, boldly and enthusiastically proclaiming Christ, and supernaturally speaking languages they didn't know. Many thought they were drunk, but 3,000 came to know the risen Christ that day.
So how did those early Christians get into one accord (again; the unity of the Spirit, not the Honda Accord)?
They were broken, confused, and humbled to the point that they had no more self-agendas. For the past several weeks, they had been jerked around on an emotional roller coaster. Jesus entered Jerusalem triumphally. Then He was betrayed. Then He was crucified. Then their lives were in great danger. Then Jesus rose from death and spent time with them. Then He told them to wait in Jerusalem. Then He disappeared into the clouds. "Blessed are the broken, confused, and humbled; for they can unite their hearts in surrender to the sovereign government of God." (My paraphrase of Matthew 5:3.)
How many people can we get in ONE Accord? Not many! How many people can God get in ONE Accord? The entire body of Christ! After all, being in one accord is much more than riding in a Honda together!