Tank
Most modern tanks most often have four crew members, or three if an auto-loader is installed. These are the:
Historically, crews have varied from just two members to a dozen. For example, pre-World War II French tanks were noted for having a two-man crew, in which the overworked commander had to load and fire the gun in addition to commanding the tank. First World War tanks were developed with immature technologies; in addition to the crew needed to man the multiple guns and machine guns, up to four crewmen were needed to drive the tank: the driver, acting as the vehicle commander and manning the brakes, drove via orders to his gears-men; a co-driver operated the gearbox and throttle; and two gears-men, one on each track, steered by setting one side or the other to idle, allowing the track on the other side to slew the tank to one side.
Praga RV
Praga RV engine had a cylinders work volume of 3468cc and supplied at 2600rpm. The fuel consumption was up to 35 liters per 100 km. The car had 3 axles, of which both back axles were driven. It had 4 gears and 1 reverse gear. The truck was rated for 2000 kg payload. The Praga RV was capable to travel at speed for 390 km without refueling of 137 liters fuel tank. When carrying infantry, typical capacity was 8-12 men, 7-11 in trunk and one in cabin besides driver. Also, it was capable to pull the 3-ton trailer. With trailer, Praga RV fuel consumption do increase to 49 liters per 100 km.