A carriage is a two- or four-wheeled horse-drawn vehicle for passengers. Coaches are a special category within carriages; they are enclosed carriages with four corner posts and a fixed roof. From the
A royal landau outside Buckingham Palace, London
Competitive driving in France
Coach of a noble family, c. 1870
George VI and Queen Elizabeth in a landau with footmen and a postilion, riding on the near wheel horse, controlling two horses. Canada, 1939
Vis-à-vis has two meanings in carriage driving: a general seating arrangement with passengers sitting face-to-face, and a specific narrow carriage for just two passengers.
Passengers sitting vis-à-vis
Vis-à-vis seating arrangement in a tourist carriage, Vienna 2005
An example of a narrow vis-à-vis horse-drawn carriage for just two passengers
1902 Test & Moret Vis-à-vis automobile