>>11942896
Mike Day did a Spectrum port of Hard Drivin' with 3d physics, opponents, replays and ghost car all in 48kb.
https://www.mobygames.com/game/4813/hard-drivin/credits/zx-spectrum/

GB Power Drivin' is based on that
https://www.mobygames.com/game/5755/race-drivin/credits/gameboy/