Yes - you are right with the difference of V and VR.
I picked the speed rating from our automobile club:
Speed Rating | Maximum Speed km/h | Maximum Speed miles/h | Remarks |
P | 150 | 93 | |
Q | 160 | 99 | |
R | 170 | 106 | |
S | 180 | 112 | |
T | 190 | 118 | |
H | 210 | 131 | |
V | 240 | 149 | |
VR | over 210 | over 131 | Old index, often not sold anymore |
W | 270 | 168 | |
Y | 300 | 186 | |
ZR | over 240 | over 149 | Old index, often not sold anymore |