The current Champions League holders needed a late strike from Eden Hazard to secure their passage past Sparta Prague in the previous round, while Steaua were surprise winners over Dutch outfit Ajax.
The home side currently occupy top spot in their domestic division having won 17 of their 21 matches thus far. That run of form has left them 12 points clear of nearest challenges Astra Giurgiu.
Chelsea, meanwhile, have a fight on their hands if they are to secure a spot in the Premier League top four this season. They currently sit in fourth spot in the table, but are five points clear of fifth-placed Arsenal.
The home side have no fresh injury concerns ahead of the match, but Stefan Nikolic could come into the team alongside Leandro Martins in attack. Cristian Tanase, meanwhile, is expected to start in the middle of midfield.
Steaua: Tatarusanu; Gardos, Latovlevici, Rapa, Chiriches; Chipciu, Tanase, Prepelita, Popa; Martins, Rusescu
Chelsea: Cech; Ivanovic, Luiz, Cahill, Cole; Ramires, Lampard; Oscar, Mata, Hazard; Torres
Sports Mole says: 1-2