Boeing 777X
Specifications

Model
777-8
777-9
Cockpit crew
Two
Two
Seating, 2-class
365
414 (42J + 372Y)
Seating, 3-class
-
349 (8F + 49J + 292Y)
Lower deck LD-3
-
48: 26 fwd + 22 aft
Cargo capacity
-
8,131 cu ft (230.2 m3)
Length
229 ft 0 in (69.8 m)
251 ft 9 in (76.7 m)
Wingspan
235 ft 5 in (71.8 m), 212 ft 9 in (64.8 m) folded
235 ft 5 in (71.8 m), 212 ft 9 in (64.8 m) folded
Wing
5,562 sq ft (516.7 m2), 9.96 aspect ratio
5,562 sq ft (516.7 m2), 9.96 aspect ratio
Height
64 ft 0 in (19.5 m)
64 ft 7 in (19.7 m)
Width, exterior
20 ft 4 in (6.20 m) fuselage
20 ft 4 in (6.20 m) fuselage
Width, cabin
19.6 ft (5.96 m)
19.6 ft (5.96 m)
Seat width
18 in (45.7 cm) in 10–abreast economy
18 in (45.7 cm) in 10–abreast economy
MTOW
775,000 lb (351,534 kg)
775,000 lb (351,534 kg)
Max. Payload
-
162,000 lb (73,500 kg)
OEW
-
400,000 lb (181,400 kg)
Fuel capacity
350,410 lb (158,940 kg), 52,300 US gal (197,977 L)
350,410 lb (158,940 kg), 52,300 US gal (197,977 L)
Range
8,690 nmi / 16,090 km
7,525 nmi / 13,940 km
Engine (×2)
General Electric GE9X-105B1A
General Electric GE9X-105B1A
Thrust (×2)
105,000 lbf (470 kN)
105,000 lbf (470 kN)

Question: What are the differences between the Boeing 777-8 and the Boeing 777-9?
Answer: The 777-8 provides seating for 365 passengers and has a range of 8,690 nmi (16,090 km) while the 777-9 has seating for 414 passengers and a range of over 7,525 nmi (13,936 km).