How do CFM LEAP-1A and Pratt & Whitney PW1100G-JM compare in fuel efficiency?

The CFM LEAP-1A delivers approximately 15 percent lower fuel burn compared to the CFM56-5B, while the Pratt & Whitney PW1100G-JM geared turbofan achieves a 16 percent reduction over the V2500 using a 3:1 fan drive gear system and a 12.5:1 bypass ratio.

What are the certified takeoff fuel flow rates for modern narrowbody turbofans?

According to certified ICAO Engine Emissions Databank (EEDB) records, the LEAP-1A has a takeoff fuel flow of 1.142 kg/s (UID: 20CM071), the LEAP-1B burns 1.095 kg/s (UID: 1CM088), and the PW1100G-JM consumes 1.120 kg/s (UID: 2PW094).

What is the highest-thrust commercial jet engine in production?

The GE Aerospace GE90-115B holds the production record with 115,300 lbf of maximum rated takeoff thrust powering the Boeing 777-300ER, followed by the GE9X rated at 105,000 lbf for the Boeing 777X.

Commercial Jet Engine Comparison Matrix

Turbofan Comparison Matrix Highlights

Compares engineering specifications, bypass ratios, takeoff thrust ratings, and fuel burn deltas across commercial jet turbofans.
Covers modern high-bypass powerplants: CFM LEAP-1A/1B, Pratt & Whitney PW1100G GTF, GE9X, GEnx-1B, and Rolls-Royce Trent XWB.
Analyzes airframe application compatibility across Airbus A320neo, A350, A220, Boeing 737 MAX, 787 Dreamliner, and 777X.

Engine Model A (Primary)

Engine Model B (Comparison)

CFM INTERNATIONAL

LEAP-1A26 / 1A32

Airbus A320neo / A321neo / A321XLR

PRATT & WHITNEY

PW1100G-JM Geared Turbofan

Airbus A320neo / A321neo

Full Engineering Parameter Comparison

Engineering Specification	Engine A	Engine B	Differential Delta