Motor sport can describe a whole selection of motor sports activities.
In the article ‘Different types of Auto Racing’ online, referenced below, they list ten motor sports in this category which include formula racing, which is unique in that the single seater car has its wheels situated on the outside of the body and each car is made specifically for the purpose of racing, custom designed.
Sports car racing cars do not have their wheels on the outside and are two-seaters.
Stock car racing is very popular in the USA and these cars are made with specific components especially designed for racing purposes.
They are built to do a high number of laps at very high speeds.
Drag car racing on the other hand, is done in streets or straight stretches and ordinary cars can be used in drag racing as well as cars modified and specifically built for drag racing.
Rallying is done on public roads which have been closed for the purpose or off the main routes.
This can be on rough terrain. Off-road racing involves racing over muddy stretches, river beds and other challenging terrains.