10 Cars with the Worst Fuel Economy

Most people scrolling through official government fuel economy numbers are looking for the big numbers that represent the most efficient vehicles. But once you've measured the best, you can also calculate the worst. And that's what we get from the Environmental Protection Agency's annual list of "Least Efficient Cars by EPA Size Class."

As you might suspect, high-performance sports cars and luxury rides dominate the rankings, with Rolls-Royce managing to claim an outsized portion of the top 10. But if you can afford one of these, you're probably not penny-pinching at the pump. The least expensive of these least-efficient cars starts at $30,295, but most cost hundreds of thousands of dollars.

There's room to argue about whether the EPA has correctly categorized these vehicles. Raise your hand if you think of the Ferrari GTC4Lusso as a minicompact. But the agency makes its own rules. Rather than fight, let's focus on just how inefficient some cars can be, and give Lamborghini bonus points for making the list with an engine that features cylinder deactivation and stop-start technology.