Peterbilt 589 features a Sleeper configuration to go with a Cummins X15 turbodiesel engine and an 18-speed manual ...

As impressive as these massive semis are, they pale in comparison to what Guinness World Records has recognized as the single largest semi-truck in the world: the Tractomas TR 10×10 D100.

This truck boasts the largest factory-installed sleeper berth in the industry ... If you're looking for a semi that exudes classic style and power, the Kenworth W990 is a top contender.