This rather baffling car chase comes from a movie titled, in English, "Strange Shadows in an Empty Room". In Britain it was re-titled "Blazing Magnum", and in Italy, "Una magnum special per Tony Saitta". It wasn't well received. According to Wikipedia:
In a retrospective review, AllMovie stated that the film has "plenty of slick visuals and action but makes little sense: The script is a chaotic jumble of half-baked mystery" and that it is "never convincing or believable for a second and is further hurt by a lack of sympathetic characters". The review concluded that "Strange Shadows in an Empty Room can only be recommended to hardcore Eurotrash buffs."
The car chase certainly seems to fit that description. (It's from the Italian version of the movie, hence the dialog.) I've never seen cars so badly damaged continue to run for so long! I wonder how many were used up while filming it?
Oh, well. That's entertainment, I guess!