What is the tire size for a 2015 Nissan Armada 4wd?

Depends on trim: base: P265/70SR18, Platinum: P265/70SR18, SL: P265/70SR18, SV: P265/70SR18

How much horsepower does a 2015 Nissan Armada 4wd have?

317 to 317 hp depending on trim

Compare all 4 trims side by side

Specification	base	Platinum	SL	SV
Engine
Horsepower	317 hp	317 hp	317 hp	317 hp
Torque	385 lb-ft	385 lb-ft	385 lb-ft	385 lb-ft
Displacement	5.6L	5.6L	5.6L	5.6L
Cylinders	8	8	8	8
Engine Type	Regular Unleaded V-8	Regular Unleaded V-8	Regular Unleaded V-8	Regular Unleaded V-8
Transmission	Automatic w/OD 5-spd	Automatic w/OD 5-spd	Automatic w/OD 5-spd	Automatic w/OD 5-spd
Drivetrain	4-Wheel Drive	Four-Wheel Drive	Four-Wheel Drive	Four-Wheel Drive
Fuel Type	Regular	Regular	Regular	Regular
Performance
Fuel Tank	106.0L	106.0L	106.0L	106.0L
Curb Weight	5847 lbs	5372 lbs	5372 lbs	5372 lbs
Towing	5000 lbs	5000 lbs	5000 lbs	5000 lbs
City (L/100km)	19.6	19.6	19.6	19.6
Highway (L/100km)	13.1	13.1	13.1	13.1
Dimensions
Length	5250 mm	5276 mm	5276 mm	5276 mm
Width	2020 mm	2014 mm	2014 mm	2014 mm
Height	1980 mm	1961 mm	1961 mm	1961 mm
Wheelbase	3130 mm	3129 mm	3129 mm	3129 mm
Ground Clearance	249 mm	249 mm	249 mm	249 mm
Cargo	583.0L	583.0L	583.0L	583.0L
Seats	8	8	8	8
Body	Standard Sport Utility Vehicle 4WD	Standard Sport Utility Vehicle 4WD	Standard Sport Utility Vehicle 4WD	Standard Sport Utility Vehicle 4WD
Tires & Wheels
Front Tires	P265/70SR18	P265/70SR18	P265/70SR18	P265/70SR18
Rear Tires	P265/70SR18	P265/70SR18	P265/70SR18	P265/70SR18
Wheel Size	18"	18"	18"	18"
Brakes & Suspension
Front Suspension	Double Wishbone	Double Wishbone	Double Wishbone	Double Wishbone
Rear Suspension	Double Wishbone	Double Wishbone	Double Wishbone	Double Wishbone
Fluids & Maintenance
Oil Type	5W-30	5W-30	5W-30	5W-30
Oil Capacity	6.7L	6.7L	6.7L	6.7L
Electric / Hybrid