The 3:00 p.m. performance of the Royal Philharmonic Orchestra with guest violinist Ray Chen, as directed by Vasily Petrenko, on January 25 at NJPAC downtown Newark, will be preceded by a 2:00 “pre-show talk,” according to the venue. It’s been 80 years and counting for this venerable institution of an orchestra. England’s most in-demand big big big band will perform Nielsen’s “Helios Overture,” Sibelius’s “Symphony #2” and a Tchaikovsky violin concerto where Chen will positively soar.