From time to time I like to photograph beautiful cars at auto shows or on a city street. Sometimes the setting could be a busy city street, other times a quiet neighborhood. I have found beautiful cars parked on a quiet street and could take my time taking photos. The best way to photograph autos is to avoid harsh light. Sunlight is fine so long as it is not in the middle of day.
If you happen to take a photo of an auto in midday-open shade may be your best bet. Be careful not to get yourself in the picture as the chrome and shiny paint finish can reflect anything in front. Taking photos at an angle may help. For stock photo purposes it will be necessary to clone out the logo as well as the flying eagle or Mercedes Benz star on top of the hood. Some cars like Porsche, Ferrari and Lamborghini are copyrighted and cannot be photographed for commercial purposes.
Many vintage automobiles are slowly disappearing. Back in 1998 I took photos of a 1930's or 40's vintage Rolls Royce. This type of car is rare as I have never seen one since. I shot the photo on film and scanned it just recently. Many places like Santa Fe New Mexico have shows featuring vintage cars. Perhaps there may be show in your neighborhood.
A good place to find beautiful cars might be los angeles as this city has a lot of rich people especially in Beverly hills. Todays cars all look the same with the same type of stying. Vintage autos give us a look backward to happier times when luxury and horsepower were unlimited. Future autos could be these tiny gas or electric powered cars designed to get 100 miles per gallon and just enough room for 1 or 2 people.