This is Standard Definition (SD). While it saves significant storage space compared to HD, the image will appear softer and less detailed, especially on modern 4K or large monitors. Source (BluRay):
The film centers on the 1976 German Grand Prix at the "Green Hell" (Nürburgring). It unflinchingly depicts Lauda’s horrific crash and his agonizing recovery. Watching Lauda force his burnt lungs to breathe and his scarred head back into a helmet just weeks after being read his last rites is one of the most powerful sequences in modern film. 4. Authenticity and Sound Rush.2013.480p.BluRay.English.Vegamovies.to.mkv