The Beamer is based on a BMW 507, evidenced by its internal name and the general design. The car is rear-engined, as seen when it is damaged, it smokes and catches fire from the back.
Grand Theft Auto III
In the beta version of Grand Theft Auto III, the Sentinel was originally called the "Beamer". The vehicle seems very simplier than the current Sentinel, most notably the size, where it is a bit smaller than the current version.
Grand Theft Auto 2
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