同どう車しゃ

noun, noun or participle which takes 'suru'

riding in the same car; sharing a car ride

Refers to the act of riding together in the same vehicle. Often used in formal or written contexts.

• 会かい議ぎの後あと、同どう車しゃして現げん場ばに向むかった。

  After the meeting, we rode together in the same car to the site.

noun

same car; the same vehicle

Refers to the identical car, not the act of riding. Less common than sense 1.