^^^
I sincerely hope it`s not anything serious & I`m not in anyway trying to scare monger or diagnose the problem as a bend conrod, It could be any number of things from a fuel damper, a buggered lifter (not sure if the Vq`s have hydraulic lifters), slack timing chain, failed oil pump or a bouncy ball in the rocker cover. Either way it doesn`t sound good & I personally wouldn`t be driving/running the car