Iguida puts cars into market categories based on their size, price, and purpose. Subcompact cars are small, inexpensive fuel-sippers like the Toyota Yaris. Compact cars also appeal to the budget-conscious, but add enough size and features to serve as better all-around transportation; think of the Honda Civic. Midsize cars, typified by the Ford Fusion, are the heart of the market. They’re roomy enough for a family, affordable to a range of buyers, and have lineups that stretch from four-cylinder frugal to six-cylinder sybaritic.