VOLVO VN 780 LONG HAUL TRACTORS IMPROVED AERODYNAMIC EFFICIENCY: WIND RESISTANCE HAS BEEN DRAMATICALLY LOWERED WHICH REQUIRES LESS ENGINE POWER TO MOVE ON DOWN THE ROAD. DRIVER COMFORT: A COMFORTABLE DRIVE IS AN ALERT, SAFER DRIVER. WITH THE DRIVER COMFORT PACKAGE YOUR DRIVING EXPERIENCE WILL BE EVEN MORE ENJOYABLE. SLEEPER CAB: WITH THE VOLVO SLEEPER COMFORT PACKAGE YOU WILL HAVE CONVENIENCE AS WELL AS COMFORT: TEMPERATURE & LIGHTING CONTROLS LOCATED WITHIN THE REACH OF THE BUNK; BUILT-IN SINK; CABINETS DOORS (INSTEAD OF NETS) INSURE SECURE ITEMS; WORK STATION WITH FOLDABLE TABLE/CUSHIONS; AM/FM/CD/MP3; POWER WINDOW & LOCKS;  Tires 22.5,  Transmission 13 Spd,  Suspension Air Ride,  Horse Power 500,  Wheel Base 231,  Ratio 3.42,  Engine Type D16,  Wheels Aluminum,  Axle Tandem,  Engine Make Volvo