This is just a test for engine sounds. Actual realistic performance, and specifications are ignored. Reverse gear is broken due to calculations being reversed.
UPDATE: I've added in the Trackmania vehicle engine from Trackmania 2020! To enable it: 1. Click "See inside" 2. Click on M3 GTR Sprite 3. Change each pink "start sound" block from "M3 GTR" to "trackmania car"