You own an original GT4 DVD9 copy.
The standard PlayStation 2 game was pressed onto a disc. This is a single-layer DVD with a capacity of roughly 4.7 gigabytes. For the majority of the PS2’s lifespan, this was sufficient. Developers became masters of optimization, fitting expansive worlds into that 4.7GB limit. Gran Turismo 4 DVD5
The bulk of the space in Gran Turismo 4 was occupied by video files. The game featured high-quality intro movies, car dealership showroom videos, replay backgrounds, and ending credits. These were rendered in high bitrate MPEG-2 format. You own an original GT4 DVD9 copy
However, as the generation matured, games became larger. Developers began utilizing discs (Dual-Layer DVDs). A DVD-9 can hold roughly 8.5 gigabytes of data by adding a second physical layer to the disc. car dealership showroom videos