For example, the Bugatti Veyron 16.4, which was produced from 2005 to 2015, has a fuel efficiency rating of approximately 8 miles per gallon (mpg) in city driving and 15 mpg on the highway. The Bugatti Chiron, which is the successor to the Veyron, has a slightly better fuel efficiency rating of approximately 9 mpg in the city and 14 mpg on the highway.
It's important to note that these fuel efficiency figures are provided by the manufacturer and can vary in real-world driving conditions, depending on factors such as driving style, traffic conditions, and road conditions.