Having some times ... there are few small inaccuracies on the cars description (maybe due to some tuning during the life of LFS) between LFS and website:
differences between LFS , website
XFG => 942Kg , 940Kg
XRG => 1150Kg , 1167Kg
FXR => 1100Kg , 1130Kg
MRT => 221Kg , 222Kg
XRT => 1223Kg , 1224Kg | 247bhp , 245bhp | 345Nm , 325Nm
RB4 => 1210Kg (lighter than XRT ??), 1224Kg | 243bhp , 241bhp | 340Nm , 319Nm
FXO => 1136Kg , 1128Kg
LX4 => 499Kg , 518Kg
LX6 => 539Kg , 540Kg
FZ5 => 1380Kg , 1379Kg
XFR => 840Kg , 836Kg | 230bhp , 240bhp | 260Nm , 270Nm
FO8 => 450bhp , 458bhp | 385Nm , 401Nm
BF1 => 720bhp , 722bhp | 284Nm , 288Nm