Nah it's like Audi, they restrict it to 155mph
Technical data for the LC 500
PERFORMANCE
Acceleration 0-60 mph (s) 4.4
Acceleration 0-62 mph (s) 4.7
Drag coefficient 0.33
Max. speed (mph) 155
bit slower on the 0 - 62 than yours..oh and I get both the V8 (and V10 too) noise and the whine as well, granted the whining is from the passenger seat usually