US-market cars were rated 250 SAE net hp against 286 PS DIN for the European version, the deficit attributed to the US car's lower compression ratio and emissions equipment. Commenters underline that SAE net and DIN are effectively the same measurement, and repeatedly note how remarkable 250 hp was for the era.
US 250hp rating versus Euro 286 PS
Mercedes-Benz 450SEL 6.9 · history