Deux cents nuits à l'heure (Two Hundred Nights Per Hour) is a one-off collaborative album by Québec singer-songwriters Serge Fiori and Richard Séguin, released in 1978.

[4] When Rivard and Bertrand proved unavailable, Fiori and Séguin (who had been composing together and contemplating the project since 1973) set out to do the album on their own.

Instead of the high concepts of Les cinq saisons and L'heptade, Harmonium's last two albums, Deux cents nuits à l'heure is more accessible.

Allmusic critic François Couture states "this album brings to a gentle close the heyday of art rock in Québec.

On March 28, 2018, Sony Music Canada announced a 40th anniversary reissue entitled Deux cents nuits à l'heure XL,[6] to be released on May 11, 2018.