I think it would actually look pretty good without the shadow on the near side of the car. Definitely something I could see on a billboard or in a magazine. Not very realistic but it is not supposed to be
KAN,
HDR stands for High Dynamic Range. One way to achieve this type of photo is to take several different exposures of the same photo and merge them in an editing software (like photoshop). It is good way to get the most color, luminosity and clarity out of whatever scene you are photographing. It can easily be overdone and look fake but I think the OPs picture looks great.