This is some assorted information on cars and trucks used in Russia in WW I:
The Book "The Russian Military Air Fleet in WW I" A Blume
Vol I car pics Pages 91,118,145, 170, 260 Benz truck pic 96
Vol II AA gun truck pics pages 58 ,100
The Tsar's cars go to alexanderpalace.org/impgarage for the cars used Delauncy-Bellevilles, Mercedes and 2 Rolls-Royce Silver ghosts at Livada
The book "The Murder of Grigory Rasputin" M Nelpa
Page 421 Black Imperial Car
" 273 large grey military motor car
" 287 not large brown color motor car owned by Prince Felix Yussopov
" 438 Benz truck (used to transport Rasputin's corpse after it was dug up and took him to be cremated)
The book "Prelude to the Revolution The murder of Rasputin" R Moe
60hp Renault owned by Grand Duke Dmitri Pavlovich