As the other comments have made clear, "Terror Express" is another entry into the "Last House on the Left" subgenre that garnered some interest in the '70s and early '80s. When juxtaposed against the unflinching violence of LHotL, "Terror Express" is a mild affair, going instead for the more marketable fixture of steamy sex scenes (which are choreographed and paced in a manner to curb all boredom). Clocking in at around 80 minutes, the film doesn't waste much time with needless details, and instead gets right down to business (so to speak) as 3 smarmy thugs take over a compartment of an express train, inciting rapes and a few violent confrontations. The violence lacks the sadistic bite of LHotL and is more action-oriented. The cast plays like a "who's who?" of Italian gore veterans, from Zora Kerowa ("Make Them Die Slowly"/"New York Ripper"), Venantino Venantini ("City of the Living Dead"), Carlo de Mejo ("City of the Living Dead"), Fausto Lombardi ("Rats: Night of Terror"), and a bunch of actors from Andrea Bianchi's "Burial Ground" (no, not the creepy dwarf).
"Terror Express" ultimately amounts to highly entertaining, lowbrow trash. It looks as if everyone involved had a blast on the project, and this enthusiasm is infectious toward the viewer. Some of its stabs at social commentary are flat (and downright laughable), but honestly, who sees an exploitation flick of this nature for the writing?