touring car vs motorcar

touring car and motorcar both are nouns.

Word	Noun	Adjective	Verb	Adverb
touring car	Yes	No	No	No
motorcar	Yes	No	No	No

As nouns, motorcar is a hypernym of touring car; that is, motorcar is a word with a broader meaning than touring car:

touring car: large open car seating four with folding top
motorcar: a motor vehicle with four wheels; usually propelled by an internal combustion engine

Other hypernyms of touring car include auto, automobile, car, machine.

touring car (noun)	motorcar (noun)
large open car seating four with folding top	a motor vehicle with four wheels; usually propelled by an internal combustion engine