Which of these cars will keep you away from the pump the longest?
Answer: The Versa (top right), but that's not a fair contest. In this quiz, we put similar vehicles head-to-head, then compared their combined miles per gallon fuel economy. Most sizes and styles are covered, including two hybrids, for good measure.
Data come from fueleconomy.gov. Comparisons are from Boston.com correspondents John Paul and Bill Griffith.