Mid-size sport utility vehicles weigh between 3,700 and 5,000 pounds, whereas large ones weigh between 5,000 and 7,100 pounds, according to HowStuffWorks. SUVs are generally heavier than mid-size cars, which weigh 3,000 to 4,000 pounds.
SUVs have a higher center of gravity than cars and are more prone to rollover accidents. The extra weight makes it difficult for SUVs to stop or change direction. Under section 179 of the U.S. tax code, small businesses that purchase SUVs weighing between 6,000 and 14,000 pounds may qualify for a tax deduction. Owners of heavier SUVs, on the other hand, can only claim minor deductions up to a maximum of $25,000 per year.