technically, no. Software adds a fixed component to comply with government speeding regulations (e.g. UNECE Regulation 39). In my 2015 LC200 Sahara, it adds 4km/h to my real speed, for every speed about 10km/h (9 is 9, then it jumps to 14 when I'm doing 10, 64 at 60, 84 at 80, 104 at 100, 114...