Cars with the largest displacement, which is basically the size of pistons in the engine, tend to be very heavy and powerful. The cylinder sizes need to be utilized, so cars of this caliber tend to have many cylinders in their engine. Along with this power naturally comes rapid acceleration.
When looking at the other end of the displacement scale with the same size range, there is much more contrast between different car models. The smaller cylinder displacement makes the engines smaller and consequently the cars are lighter. Although the data starts to diverge when looking at acceleration and mileage. Of these small displacement cars, they can range from slow to moderately fast, as well as poor mileage to great mileage, even for today's standard. The biggest reason behind these discrepancies is the technology of the time when each car was manufactured. All of the cars in question range from the early 70s - 80s.