The gold standard. It’s highly accurate but has a slight learning curve.

You may find variants of the ROM:

Relive the Arcade Glory: Cadillacs and Dinosaurs ROM Download Guide

For many retro gaming enthusiasts, downloading the ROM version of Cadillacs and Dinosaurs is the only way to experience this classic game. The original consoles and cartridges are becoming increasingly rare and expensive, making it difficult for gamers to play the game on original hardware.

The game’s genius lies in its mechanics:

You can still buy the original arcade board on eBay (averages $200–$400) and dump the ROM yourself using a device like a ROM burner.

For many arcade-goers, this was the pinnacle of side-scrolling beat-’em-ups, rivaling Final Fight and Streets of Rage .

Downloading ROMs for games you do not own the original arcade board or a legal copy of is copyright infringement in most countries. That said, many people download 30-year-old arcade ROMs for preservation/emulation. Proceed at your own risk.

Unlike other brawlers of the era, you can actually drive the iconic Cadillac in certain stages, mashing through enemies.

It sounds like you're looking for a of the Cadillacs and Dinosaurs ROM, likely for use in an emulator like MAME (Arcade) or on a retro console.