What puzzles me are the various classes or types of the participating vehicles.
I have an idea what a "Heavy Car/Grosse Voiture" or a "Light Car/Voiture Legère" or a "Voiturette/Vetturette" or even a "Cyclecar" was. Also I noticed that some of the races were not exclusively for cars but for motor cycles, too.
But on Darren Galpin's website you will find "Cycle", "Bicycle", "Tricycle" and - to top it all - "Quadricycle".
I can imagine that the difference between Bi-, Tri- and Quadricycles lies in the number of wheels. But then: Is a 4-wheel-cycle not in fact a car?

What did a Quadricycle look like? And what seperated it from a proper car?
Is a "Cycle" identical to a two-wheeled "Motor Cycle"?
Eventually: At the 1902 Paris-Vienna race four "Bicycles" are listed (Bucquet and Labitte on Werner in 52nd resp. 58th place, Krieger and Podesenick on Laurin-Klement in 66th resp. 67th place). Is a "Bicycle" not in fact a two-wheeler
without an engine?
Does it mean these four men were in fact bike-riders pedalling against motor cycles and cars over nearly 1000 kilometres for four days?

This is where my imagination definitely ends. :
So many questions. Help! (And pictures, please!;)) [/B][/QUOTE]
I must confess that I'm not at all well-versed in the terminologies used by the French in the early days of the automobile, however, in the US, there wasn't truly a common name in use for self-propelled road-going vehicles for a number of years.
Henry Ford's famous "first car", built in 1895 has almost always been called the "Quadricycle" by not only historians, but also by Ford Motor Company and the Henry Ford Museum, where the car resides to this day (although, by some early accounts, Ford himself referred to it -- lightly, I assume -- as the "Popper", perhaps from it's single cylinder, un-muffled exhaust sound).
"Motor Carriage", "Horseless Carriage" , "Motor Car"and other more fanciful names seem to have circulated in the US for several years, before the French word "Automobile" came to be the one term in common use.
In the US at least, "Cyclecar" came into use, not only in common language, but also by manufacturers, of the very light small cars that had a brief fling of popularity in the years immediately prior to the US entering WW-I. These were cars approximately half the size of the light cars then in production, such as the Model T Ford (in fact, Ford Motor Company designed and tested a 1/2-sized Model T, with lightweight wire wheels approximately the same wheels as used on motorcycles of the day). Many of these cyclecars used motorcycle engines (or at least similar engines), belt drives, and light wire wheels. Cars such as the Imp Cyclecar, the Woods Mobilette, and the Scripps-Booth, the Greyhound, Red Bug, and Dumore all were of this type (also the Briggs & Stratton, and the Orient Buckboard, which were derivatives of the Red Bug) came and went in the years 1912-17.
Art Anderson