Max speed is supposed to be Mach 1.6
500 m/s = 1800 km/h = approx M 1.46
“Roland has a speed of 550 m/s and a range of 6.2 km”
“An upgraded missile which entered production in 1988 with speed increased from 550 m/s to 620 m/s and range increased from 6.3 to 8.5 km with maximum effective altitude increased to 6,000 m”
Right now Roland 1 is listed at 500 m/s while the Roland is listed at 570m/s
These values are ahistorical
Make a bug report if you have proper sources.