747fan From United States of America, joined Jun 2007, 1165 posts, RR: 1 Reply 2, posted (5 years 10 months 3 weeks 5 days 3 hours ago) and read 3802 times:
I know that the most powerful engine offered is the Rolls-Royce Trent 772 (72,000 lbs. of thrust); I also believe that its the market leader for the A330, followed by the PW4064/4068 and the GE CF6-80E2. Knowing Rolls-Royce's reliability reputation with the RB211, the Trent probably is the most reliable but also is likely rather costly to maintain given its three-spool design. This also means that it probably has worse fuel consumption than the PW & GE due to the fact that the RR 3-spool engines such as the Trent are heavier. The PW probably has the worst emissions - I've seen photos with exhaust trails coming out the back of PW4000's (not only the A330 but also the 777, 744, 767, etc.) that made them look like they were JT8D-powered.