Jan 17, 2022 · Tank cars currently range widely in size from 40 to 60 feet in length and capable of hauling between 15,000 to more than 30,000 gallons. One interesting design from DuPont during the 1980s featured a car that could handle 43,800 gallons which was well over 60 feet in length, requiring the use of four trucks (16 axles).