Audi has designed a car frame that is so light that it only takes 2 people to lift it off the ground. On the contrary, SUVs are becoming larger and heavier. Ford is planning to produce the largest SUV ever. It will weigh around 10,000 pounds. A full frame consists of metal bars that are bent and welded into a rectangular shape.
Full frames are very sturdy and heavy.
These frames are still found on some of today's very large cars, light trucks, and SUVs. In the 1970's fuel crisis, cars dramatically changed. Smaller, lighter cars became popular because they consumed far less gas. It was around this time that the uni-body frame was introduced. The weight of the car is distributed over the area of the frame.