In the original releases of Grand Theft Auto: Vice City, the Comet assumes a fastback profile with connected tail lamps and curved rear window, while in Xbox and Mobile versions of GTA Vice City, Grand Theft Auto: San Andreas and Grand Theft Auto: Vice City Stories, the car assumes backwards-slanted standalone C-pillars with small rear window, separated tail lamps and a central license plate, bearing a heavy resemblance to the rear section of the Porsche 914. The Comet is distinguished by the angled front end, small bumpers with overriders and circular headlamps, along with their open tops.
The headlamps may also have been inspired by the 1966-1969 Alfa Romeo Spider. 3D Universe renditions of the Comet are front-engined, unlike the real Porsche 911, which is famously rear-engined this led to speculation that the Comet was inspired by a Datsun 240Z. The Comet is based on the Porsche 911 and best resembles the 911SC Targa from the late '70's or the early 1980s however, like newer 911 models, it has an all-wheel-drive configuration.