A cabriolet version of the Übermacht Sentinel Classic sports car, a nameplate returning from earlier GTA titles, is due to appear in Grand Theft Auto VI. It is shown parked in red at night on the Ocean Drive-style street in a scroll-driven promotional video of Jason and Lucia, and it appears to be based on the BMW 3 Series (E30) cabriolet.
Vehicle data via GTA Wiki (Fandom), CC BY-SA 3.0.