For the hell of it, here's a list of cars that I would expect to see in a movie based on OutRun...
Ferrari Testerossa Starman (1984 - 1987) convertible. Even if this isn't the main car. It should at least have a cameo, or some side character drives one. It would be dumb not to feature this car in some capacity.
Ferrari F40 (F120) (1987 - 1992). It was the main car featured in Turbo OutRun The Sequel to OutRun. Probably a cameo would be fine. Also, John Carmack owned one of these.
Ferrari Enzo (2002–2004) - A car from OutRun 2/ SP, the main car featured in the promotional material was an F50. But the F50 seems a bit redundant alongside the F40. I like the look of the F40 more.
Ferrari F355 (1994 - 1999) - How about the F355 from Yu Suzuki's other Sega arcade racing sim?
Dino 246 GT (1972 - 1974) Another Ferrari featured in OutRun 2/SP
Ferrari 328 GTS (1985 - 1989) - I dunno, I just like the look of this one. Was featured in OutRun 2006 Coast 2 Coast.
Probably throw in a couple current Ferrari's to please the Ferrari company... maybe that electric one?