2025 Audi S8 vs 2026 Genesis G90

$125,300 · Sedan

$92,700 · Sedan

Comparison Overview

The 2025 Audi S8 explodes onto the scene with the ferocious capability of 563 horsepower, making it the undisputed performance titan in this clash of flagship sedans. Its sheer grunt, boasting 590 lb-ft of torque, promises exhilarating blasts from 0-60 mph that the 375 hp Genesis G90 simply cannot match. However, the G90 counters with serene elegance and superior cost efficiency, retailing at $92,700—a substantial $32,600 less than the S8’s $125,300 sticker price. While the S8 sips premium fuel at a combined 18 MPG, the G90 delivers a slightly thriftier 21 MPG combined, using recommended premium. Both offer AWD security, but the Audi’s athletic 209.5-inch frame hints at dynamic handling prowess, whereas the G90 prioritizes opulent rear-seat comfort in a nearly identical 207.7-inch footprint.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2026 Genesis G90

The Genesis G90 provides superior fuel efficiency at 21 MPG combined, making daily driving less expensive than the Audi S8's 18 MPG.

👨‍👩‍👧‍👦 Best for Families

2026 Genesis G90

The G90 offers a slightly more spacious rear area and significantly lower entry cost, appealing to practicality over ultimate performance.

🏎️ Best for Enthusiasts

2025 Audi S8

The Audi S8’s commanding 563 hp and 590 lb-ft of torque offer vastly superior raw performance potential.

💰 Best Value

2026 Genesis G90

The G90 offers a nearly 188 hp difference for a massive $32,600 saving over the S8.

Choose the Audi S8 if...

You demand exhilarating straight-line speed powered by 563 horsepower.
You prioritize the highest levels of torque available, listed at 590 lb-ft.
You appreciate the stability and dynamic handling provided by an all-wheel-drive platform built for performance.

Choose the Genesis G90 if...

Your budget is constrained, as the MSRP is $92,700 compared to $125,300.
You prefer better fuel economy, achieving 21 MPG combined versus 18 MPG.
You prefer slightly better maneuverability given the G90's shorter length of 207.7 inches.

Key Dimensions

Dimension	Audi S8	Genesis G90
Length	209.5"	207.7"
Width	76.6"	76.0"
Height	58.5"	58.7"
Wheelbase	123.2"	125.2"

Features Comparison

Safety

Feature	Audi	Genesis
Lane Departure Warning	✓	✓
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
Front Ventilated Disc Brakes	✓	✓
Rear Ventilated Disc Brakes	✓	✓
Brake Preparation System	✓	—
Brake Assist	✓	✓
Tire Pressure Monitoring System	✓	✓
Automatic Headlights	✓	✓
Headlight Delay-Off	✓	✓
LED Headlights	✓	✓
Self-Leveling Headlights	✓	—
Daytime Running Lights	✓	✓
Cornering Lights	✓	—
Headlight Washers	✓	—
Front Fog Lights	✓	—
Integrated Turn Signal Mirrors	✓	—
Front Headrests	2	2
Front Height Adjustable Headrests	✓	—
Rear Headrests	3	3
Rear Height Adjustable Headrests	✓	✓
Rear Center 3-Point Seatbelt	✓	✓
Anti-Theft Alarm System (Remote)	✓	✓
Engine Immobilizer	✓	✓
Blind Spot Monitor	—	✓
Lane Keeping Assist System	—	✓
Rear Cross Traffic Alert	—	✓
Driver Attention Alert	—	✓
Front Power Adjustable Headrests	—	✓

Engine

Feature	Audi	Genesis
Base Engine Displacement	4.0 L	3.5 L
Number of Cylinders	V8	V6
Base Engine Type	mild hybrid	gas
Horsepower	563 hp	375 hp @ 5800 rpm
Torque	590 lb-ft	391 lb-ft @ 1300 rpm
Number of Valves	32	24
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓
Cylinder Deactivation	✓	—

Drive Train

Feature	Audi	Genesis
Transmission Type	8-speed shiftable automatic	8-speed shiftable automatic
Drivetrain Type	all wheel drive	all wheel drive
[object Object]	✓	—
[object Object]	✓	—
Center Differential Type	—	Limited Slip

Fuel

Feature	Audi	Genesis
Fuel Type	premium unleaded (required)	premium unleaded (recommended)
EPA Fuel Economy (City/Highway)	15/24 MPG	18/26 MPG
EPA Fuel Economy (Combined)	18 MPG	21 MPG
EPA Driving Range (City/Highway)	325.5/520.8 mi.	347.4/501.8 mi.
Fuel Tank Capacity	21.7 gal.	19.3 gal.

Comfort & Convenience

Feature	Audi	Genesis
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	✓	—
Wireless Charging Pad	✓	✓
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	✓	—
Extended Cabin Heating	✓	—
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	—
Cooled Storage Compartment	✓	—
Cruise Control on Steering Wheel	—	✓
Rear Parking Sensors with Side Sensing	—	✓
Automatic Parking Assist	—	✓
Adaptive Cruise Control	—	✓
Overhead Console with Storage	—	✓
Three Zone Climate Control	—	✓
Extended Cabin Heating/Cooling	—	✓

In Car Entertainment

Feature	Audi	Genesis
Infotainment Display	10.1 in	12.3 in
AM/FM Stereo	✓	✓
Premium Brand Speakers	Bang & Olufsen	Bang & Olufsen
Stereo Power	730W	1400W
Speaker System	17	15
Surround Audio	Discrete	Discrete
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
USB Port with External Media Control	✓	✓
Satellite Radio	✓	✓
Satellite Radio Trial Period	3 months	3 months
Speed Sensitive Volume Control	✓	✓

Power Feature

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

Frontseats

Feature	Audi	Genesis
Front Head Room	38.3 in.	39.4 in.
Front Leg Room	41.5 in.	42.3 in.
Front Shoulder Room	59.1 in.	59.1 in.
Seat Material: Premium Leather	✓	✓
Front Seat Type: Sport	✓	—
Driver Seat Power Adjustments	18-way	18-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Memory Settings	2	3
Passenger Seat Power Adjustments	18-way	16-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Driver Seat Ventilation	✓	✓
Passenger Seat Ventilation	✓	✓
Seat Massage Function	✓	✓
Front Seat Type: Bucket	—	✓
Driver Seat Thigh Extension	—	✓
Passenger Seat Thigh Extension	—	✓

Rearseats

Feature	Audi	Genesis
Rear Head Room	38.5 in.	38.0 in.
Rear Leg Room	44.3 in.	37.8 in.
Rear Shoulder Room	57.6 in.	57.9 in.
Split-Folding Rear Seatback	✓	✓
Folding Rear Seat Feature	✓	—
Pass-Thru Center Armrest	✓	—
Reclining Rear Seats	—	✓
Folding Center Armrest	—	✓
Heated Rear Seats (Multi-Level)	—	✓

Tires and Wheels

Feature	Audi	Genesis
Wheel Material	Alloy	—
Wheel Size	21 in	20 x 9.5 in.
Tire Type	Performance	All Season
Tire Size	265/35R21	275/40R20
Spare Tire Type	Temporary	Temporary
Spare Tire Location	Inside Mounted	Inside Mounted
Wheel Finish	—	Painted Alloy

Suspension

Feature	Audi	Genesis
Four-Wheel Independent Suspension	✓	✓

Warranty

Feature	Audi	Genesis
Basic Warranty	4 yr./ 50000 mi.	5 yr./ 60000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	10 yr./ 100000 mi.
Corrosion/Rust Warranty	12 yr./ unlimited mi.	7 yr./ unlimited mi.
Roadside Assistance	4 yr./ unlimited mi.	5 yr./ unlimited mi.
Complimentary Scheduled Maintenance	—	3 yr./ 36000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Audi S8 and 2026 Genesis G90.

What is the significant performance gap between the 2025 Audi S8 and the 2026 Genesis G90?

The Audi S8 holds a massive advantage with 563 horsepower, whereas the Genesis G90 produces 375 horsepower, resulting in a 188 hp difference favoring the Audi for outright acceleration.

How does the fuel economy compare for these two large AWD sedans?

The Genesis G90 is more efficient, posting a combined 21 MPG (18/26 City/Highway), while the performance-focused Audi S8 achieves 18 MPG combined (15/24 City/Highway).

Is the extra cost of the Audi S8 justified by its size and utility?

No, the S8 is only marginally larger; it is 1.8 inches longer but offers identical 12.0 cu ft cargo capacity (the S8 lists 12.5 cu ft). The price difference is $32,600.

Do both vehicles require premium gasoline for their engines?

The 2025 Audi S8 strictly requires premium unleaded fuel for its high-output engine, while the 2026 Genesis G90 only recommends premium unleaded.

Which car offers a lower barrier to entry for luxury AWD performance?

The 2026 Genesis G90 has a significantly lower MSRP of $92,700, making it the better value proposition compared to the $125,300 starting price of the S8.