2025 Audi RS Q8 vs 2026 INFINITI QX80

$136,200 · Crossover

$83,750 · SUV

Comparison Overview

Choosing between a performance flagship and a large luxury cruiser often boils down to power versus practicality and price. If raw acceleration is your main goal, the 2025 Audi RS Q8 boasts an impressive 631 horsepower, dwarfing the 2026 INFINITI QX80's 450 horsepower. However, that performance comes at a steep cost, with the RS Q8 starting at $136,200 compared to the QX80's $83,750 MSRP—a difference of over $52,450. Fuel economy is close, with the QX80 offering a slightly better 18 MPG combined versus the Audi's 16 MPG, though both demand premium fuel. The QX80 is also physically larger at 211.2 inches long and 76.6 inches tall, suggesting more interior space than the RS Q8's 33 cubic feet of cargo volume. Deciding factors hinge heavily on whether you prioritize near-supercar speed or significant cost savings and larger dimensions.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 INFINITI QX80

The INFINITI QX80 is slightly more fuel-efficient at 18 MPG combined and its larger size might offer a more commanding, though perhaps less nimble, daily drive.

👨‍👩‍👧‍👦 Best for Families

2026 INFINITI QX80

The 2026 QX80 is substantially larger overall, making its 211.2-inch length and greater height more conducive to moving passengers and gear comfortably.

🏎️ Best for Enthusiasts

2025 Audi RS Q8

The Audi RS Q8 is the clear performance leader, producing a massive 631 horsepower and 627 lb-ft of torque.

💰 Best Value

2026 INFINITI QX80

The QX80 is $52,450 cheaper than the RS Q8 while still delivering 450 horsepower.

Choose the Audi RS Q8 if...

You absolutely need segment-leading power, demonstrated by its 631 hp output.
You prefer the handling dynamics associated with a smaller footprint (197.7 inches long).
Premium unleaded is required, and you are willing to pay the $136,200 MSRP for ultimate performance.

Choose the INFINITI QX80 if...

Budget is a major concern, as the $83,750 price tag saves you $52,450.
Maximum physical size and capability are needed, evidenced by its 211.2-inch length.
You seek slightly better efficiency, achieving 18 combined MPG compared to the Audi's 16 MPG.

Key Dimensions

Dimension	Audi RS Q8	INFINITI QX80
Length	197.7"	211.2"
Width	79.0"	83.3"
Height	67.5"	76.6"
Wheelbase	117.9"	121.1"

Features Comparison

Safety

Feature	Audi	INFINITI
Blind Spot Monitor	✓	✓
Lane Departure Warning	✓	✓
Lane Keeping Assist System	✓	✓
Rear Cross Traffic Alert	✓	✓
Pre-Collision Safety System	✓	✓
Post-Collision Safety System	✓	✓
Dual Front Side-Mounted Airbags	✓	✓
Dual Rear Side-Mounted Airbags	✓	—
Front Head Airbags	✓	✓
Rear Head Airbags	✓	✓
Passenger Airbag Occupant Sensing Deactivation	✓	✓
Electronic Stability Control	✓	✓
Traction Control System	✓	✓
LATCH System	✓	✓
Rear Door Child Safety Locks	✓	✓
Anti-lock Brakes (ABS)	4-Wheel	4-Wheel
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Daytime Running Lights	✓	✓
Integrated Turn Signal Mirrors	✓	✓
Front Headrests	2	2
Front Integrated Headrests	✓	—
Rear Headrests	3	2
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	—
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Driver Attention Alert	—	✓
Third Row Head Airbags	—	✓
Front Ventilated Disc Brakes	—	✓
Rear Ventilated Disc Brakes	—	✓
Brake Preparation System	—	✓
Front Fog Lights	—	✓
Front Height Adjustable Headrests	—	✓

Engine

Feature	Audi	INFINITI
Base Engine Displacement	4.0 L	3.5 L
Number of Cylinders	V8	V6
Base Engine Type	mild hybrid	gas
Horsepower	631 hp	450 hp @ 5600 rpm
Torque	627 lb-ft	516 lb-ft @ 3600 rpm
Number of Valves	32	24
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	Audi	INFINITI
Transmission Type	8-speed shiftable automatic	9-speed shiftable automatic
Drivetrain Type	all wheel drive	rear wheel drive
[object Object]	✓	—
[object Object]	✓	—
Hill Descent Control	✓	—

Fuel

Feature	Audi	INFINITI
Fuel Type	premium unleaded (required)	premium unleaded (recommended)
EPA Fuel Economy (City/Highway)	14/20 MPG	16/20 MPG
EPA Fuel Economy (Combined)	16 MPG	18 MPG
EPA Driving Range (City/Highway)	315.0/450.0 mi.	377.6/472.0 mi.
Fuel Tank Capacity	22.5 gal.	23.6 gal.

Comfort & Convenience

Feature	Audi	INFINITI
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	—
Audio Controls on Steering Wheel	✓	✓
Electric Power Steering	✓	✓
Front View Camera	✓	✓
Side View Camera	✓	✓
Rear View Camera	✓	✓
Front Parking Sensors	✓	✓
Rear Parking Sensors with Side Sensing	✓	—
Wireless Charging Pad	✓	✓
Adaptive Cruise Control	✓	✓
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	✓
Heated Steering Wheel	✓	✓
Four Zone Climate Control	✓	—
Rear Ventilation Ducts with Fan Control	✓	✓
Interior Air Filtration	✓	✓
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	✓
Cruise Control on Steering Wheel	—	✓
Rear Parking Sensors	—	✓
3rd Row Cupholders	—	✓
Overhead Console with Storage	—	✓
Manual Rear Seat Easy Entry	—	✓
Three Zone Climate Control	—	✓

In Car Entertainment

Feature	Audi	INFINITI
Infotainment Display	10.1 in	14.3 in
AM/FM Stereo	✓	✓
Premium Brand Speakers	Bang & Olufsen	—
Stereo Power	730W	600W
Speaker System	17	14
Surround Audio	Discrete	—
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	With Real Time Traffic
Satellite Radio Trial Period	3 months	3 months
Klipsch Speakers	—	✓
Subwoofer Count	—	1
Speed Sensitive Volume Control	—	✓

Power Feature

Feature	Audi	INFINITI
One-Touch Power Windows	4	4
Moonroof Type	1st Row Power Glass Extended	1st Row Power Glass Extended
Keyless Entry	✓	✓
Heated Mirrors	✓	✓
Reverse Tilt Dual Mirrors	—	✓

Frontseats

Feature	Audi	INFINITI
Front Head Room	37.1 in.	39.1 in.
Front Leg Room	41.3 in.	43.8 in.
Front Shoulder Room	59.5 in.	64.2 in.
Seat Material: Premium Leather	✓	—
Front Seat Type: Sport	✓	—
Driver Seat Power Adjustments	8-way	8-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Memory Settings	2	2
Passenger Seat Power Adjustments	8-way	8-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Passenger Seat Memory Settings	2	—
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Driver Seat Ventilation	✓	—
Passenger Seat Ventilation	✓	—
Front Hip Room	—	59.9 in.
Seat Material: Leatherette	—	✓
Front Seat Type: Bucket	—	✓

Rearseats

Feature	Audi	INFINITI
Rear Head Room	38.1 in.	37.8 in.
Rear Leg Room	40.2 in.	39.2 in.
Rear Shoulder Room	58.4 in.	63.7 in.
Split-Folding Rear Seatback	✓	—
Reclining Rear Seats	✓	✓
Folding Center Armrest	✓	—
Rear Hip Room	—	59.9 in.
Folding Rear Seatback	—	✓
Fixed Center Armrest	—	✓
Heated Rear Seats (Multi-Level)	—	✓
Power Folding Third Row Seat	—	✓

Tires and Wheels

Feature	Audi	INFINITI
Wheel Material	Alloy	Alloy
Wheel Diameter	22 in	—
Tire Type	Performance	All Season
Tire Size	295/40R22	275/60R20
Wheel Size	—	20 x 8.0 in
Spare Tire Type	—	Full Size Non-Matching
Spare Tire Location	—	Underbody Mounted

Suspension

Feature	Audi	INFINITI
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	✓	✓
Rear Stabilizer Bar	✓	✓

Warranty

Feature	Audi	INFINITI
Basic Warranty	4 yr./ 50000 mi.	4 yr./ 60000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	6 yr./ 70000 mi.
Corrosion/Rust Warranty	12 yr./ unlimited mi.	7 yr./ unlimited mi.
Roadside Assistance	4 yr./ unlimited mi.	4 yr./ 60000 mi.
Complimentary Scheduled Maintenance	—	3 yr./ 45000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Audi RS Q8 and 2026 INFINITI QX80.

What is the main performance difference between the 2025 Audi RS Q8 and the 2026 INFINITI QX80?

The Audi RS Q8 is significantly more powerful, delivering 631 horsepower and 627 lb-ft of torque. The QX80 produces a respectable 450 horsepower and 516 lb-ft of torque, resulting in a 181 hp deficit.

How much more does the Audi RS Q8 cost compared to the INFINITI QX80?

The 2025 Audi RS Q8 has an MSRP of $136,200, making it $52,450 more expensive than the 2026 INFINITI QX80, which starts at $83,750.

Is the QX80 a better choice for hauling cargo?

Based on the provided specs, the Audi RS Q8 offers slightly more usable cargo space at 33 cubic feet compared to the QX80's 22 cubic feet, despite the QX80 being physically larger overall.

Which vehicle offers better gas mileage for long commutes?

Both vehicles require premium fuel, but the QX80 edges out the RS Q8 slightly with 18 MPG combined versus the Audi's 16 MPG combined rating.

Do both SUVs require the same type of fuel?

No, the Audi RS Q8 explicitly requires premium unleaded fuel for its high-output engine. The INFINITI QX80 only recommends premium unleaded fuel for its performance.

How do the drivetrains compare?

The Audi utilizes an all-wheel-drive system paired with an 8-speed automatic transmission, whereas the QX80 comes standard with rear-wheel drive and a 9-speed automatic transmission.