To answer the question as its written, then yes it is motorsport.
BUT, unless you do sub 9 seconds, I dont believe its all that challenging.
To get it together for a 10-14 sec race in a straight line is not nearly as demanding as 10 laps or so accelerating, up and down shifts, selecting the right gear for road speed/RPM/track conditions, braking and cornering etc......I believe takes a higher level of skill.
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But yes, drags is motorsport.