A bus can weigh from 6,001 pounds to more than 33,001 pounds, depending on the size and classification of the bus. A 13-meter-long, two-axle bus with a six-cylinder, rear-mounted, 12-liter diesel engine weighs 18 tons.
Other factors can contribute to the different weights of buses, such as the availability of onboard entertainment, air-conditioning systems and other facilities. Buses are also customized and fitted with different accessories depending on the region, as people from around the world have different bus-riding needs. These differences are often addressed at places like the Euro Bus Expo 2014, which is expected to host 10,000 professionals from the coach and bus industry for a three-day event.