I will have to agree with aforesaid commentary, the general instrument quality is pretty low. That being said, I feel like the track goes along pretty incoherent. The parts on their own sound pretty good, but there's some grid errors and mistimed parts that lead to some pretty awkard stuff like 2:41, until it kinda sounds, quote on quote, like "a mess of chiptune, breakbeat, and orchestral".
Sorry if I started out on a bit of a negative side, lemme get to the positives! I think the atmosphere of racing VGM is definitely there, as it sounds like an old retro arcade racing game! And I can't really blame you for the low instrument quality of course, because having high quality orchestral stuff can get really expensive really quickly.
Production/composition: 6/10
Mix/master: 8/10
Relevance to the theme: 6.5/10