2025 Mercedes-Benz S-Class vs 2026 Genesis G90

$117,750 · Sedan

$92,700 · Sedan

Comparison Overview

Deciding between ultimate luxury and savvy spending is the central struggle when comparing the 2025 Mercedes-Benz S-Class and the 2026 Genesis G90. If budget is a major factor, the G90 saves you a significant $25,050, starting at $92,700 versus the S-Class's $117,750. However, you pay for that prestige; the Mercedes delivers 442 hp, a healthy 67 hp more than the G90's 375 hp output. In daily driving, both are large sedans, but the S-Class nudges ahead with 24 combined MPG compared to the G90's 21 combined MPG. While both offer AWD, the Mercedes is slightly larger overall at 208.2 inches long. Ultimately, the choice hinges on whether the inherent brand equity and extra performance justify the premium price tag for the S-Class.

Size Comparison

Performance

Fuel Efficiency

Full Specifications

Our Verdicts

🚗 Best for Commuters

2025 Mercedes-Benz S-Class

The S-Class wins slightly for commuters due to its marginally better fuel economy, achieving 31 highway MPG versus the G90's 26 MPG.

👨‍👩‍👧‍👦 Best for Families

2025 Mercedes-Benz S-Class

While cargo capacity is similar (12.8 cu ft vs. 12 cu ft), the S-Class's slightly larger exterior dimensions offer marginal advantages in cabin space.

🏎️ Best for Enthusiasts

2025 Mercedes-Benz S-Class

The S-Class offers significantly more thrust, boasting 442 hp compared to the G90's 375 hp.

💰 Best Value

2026 Genesis G90

The Genesis G90 provides nearly identical luxury proportions while undercutting the S-Class by a considerable $25,050.

Choose the Mercedes-Benz S-Class if...

You prioritize having the highest output, as the 2025 S-Class provides 442 horsepower.
Brand cachet and the latest technology are non-negotiable for your executive vehicle.
You prefer the marginal efficiency gain, achieving 24 combined MPG over the G90's 21.

Choose the Genesis G90 if...

Saving $25,050 is critical, with the G90 starting at $92,700.
You appreciate the peace of mind from using premium unleaded as 'recommended' rather than 'required'.
You value excellent luxury presentation that doesn't necessitate the top-tier price bracket.

Key Dimensions

Dimension	Mercedes-Benz S-Class	Genesis G90
Length	208.2"	207.7"
Width	76.9"	76.0"
Height	59.2"	58.7"
Wheelbase	126.6"	125.2"

Features Comparison

Safety

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

Engine

Feature	Mercedes-Benz	Genesis
Base Engine Displacement	3.0 L	3.5 L
Number of Cylinders	inline 6	V6
Base Engine Type	mild hybrid	gas
Horsepower	442 hp	375 hp @ 5800 rpm
Torque	413 lb-ft	391 lb-ft @ 1300 rpm
Number of Valves	24	24
Camshaft Type	Double overhead cam (DOHC)	Double overhead cam (DOHC)
Variable Valve Timing	Variable	Variable
Fuel Injection Type	✓	✓

Drive Train

Feature	Mercedes-Benz	Genesis
Transmission Type	9-speed shiftable automatic	8-speed shiftable automatic
Drivetrain Type	all wheel drive	all wheel drive
Center Differential Type	Limited Slip	Limited Slip

Fuel

Feature	Mercedes-Benz	Genesis
Fuel Type	premium unleaded (required)	premium unleaded (recommended)
EPA Fuel Economy (City/Highway)	21/31 MPG	18/26 MPG
EPA Fuel Economy (Combined)	24 MPG	21 MPG
EPA Driving Range (City/Highway)	420.0/620.0 mi.	347.4/501.8 mi.
Fuel Tank Capacity	20.0 gal.	19.3 gal.

Comfort & Convenience

Feature	Mercedes-Benz	Genesis
Push Button Start	✓	✓
Power Tilt and Telescopic Steering Wheel	✓	✓
Transmission Controls on Steering Wheel	✓	✓
Cruise Control 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	✓	—
Automatic Parking Assist	✓	✓
Wireless Charging Pad	✓	✓
Adaptive Cruise Control	✓	✓
Universal Remote Transmitter	✓	✓
Front Cupholders	✓	✓
Rear Cupholders	✓	✓
Front Door Pockets	✓	✓
Rear Door Pockets	✓	✓
Overhead Console with Storage	✓	✓
Front Seatback Storage	✓	✓
Leather Steering Wheel	✓	✓
Wood Trim on Steering Wheel	✓	—
Dual Zone Climate Control	✓	—
Rear Ventilation Ducts	✓	—
Interior Air Filtration	✓	—
Extended Cabin Heating/Cooling	✓	✓
Sun Sensor	✓	—
Dual Vanity Mirrors	✓	✓
Auto-Dimming Rearview Mirror	✓	✓
Turn Signal Indicators in Mirrors	✓	—
Rear Parking Sensors with Side Sensing	—	✓
Heated Steering Wheel	—	✓
Three Zone Climate Control	—	✓
Rear Ventilation Ducts with Fan Control	—	✓

In Car Entertainment

Feature	Mercedes-Benz	Genesis
Infotainment Display	12.8 in	12.3 in
AM/FM Stereo	✓	✓
Premium Speaker Brand	Burmester	—
Stereo Power	710W	1400W
Speaker System	15	15
Subwoofer Count	2	—
Surround Audio	Discrete	Discrete
Android Auto (Wireless)	✓	✓
Apple CarPlay (Wireless)	✓	✓
USB Port	✓	✓
Auxiliary Audio Input	✓	—
USB Port with External Media Control	✓	✓
Memory Card Slot	✓	—
Satellite Radio	✓	✓
Satellite Radio Trial Period	6 months	3 months
Speed Sensitive Volume Control	✓	✓
Premium Brand Speakers	—	Bang & Olufsen

Power Feature

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

Frontseats

Feature	Mercedes-Benz	Genesis
Front Head Room	42.1 in.	39.4 in.
Front Leg Room	41.4 in.	42.3 in.
Front Shoulder Room	59.6 in.	59.1 in.
Seat Material: Leather	✓	—
Front Seat Type: Bucket	✓	✓
Driver Seat Power Adjustments	12-way	18-way
Driver Seat Height Adjustment	✓	✓
Driver Seat Lumbar Support	Power	Power
Driver Seat Thigh Extension	✓	✓
Driver Seat Memory Settings	3	3
Passenger Seat Power Adjustments	12-way	16-way
Passenger Seat Height Adjustment	✓	✓
Passenger Seat Lumbar Support	Power	Power
Passenger Seat Thigh Extension	✓	✓
Passenger Seat Memory Settings	3	—
Driver Seat Heating	Multi-level	Multi-level
Passenger Seat Heating	Multi-level	Multi-level
Driver Seat Ventilation	✓	✓
Passenger Seat Ventilation	✓	✓
Seat Massage Function	✓	✓
Seat Material: Premium Leather	—	✓

Rearseats

Feature	Mercedes-Benz	Genesis
Rear Head Room	39.4 in.	38.0 in.
Rear Leg Room	43.8 in.	37.8 in.
Rear Shoulder Room	59.0 in.	57.9 in.
Folding Center Armrest	✓	✓
Split-Folding Rear Seatback	—	✓
Reclining Rear Seats	—	✓
Heated Rear Seats (Multi-Level)	—	✓

Tires and Wheels

Feature	Mercedes-Benz	Genesis
Wheel Material	Alloy	—
Wheel Size	19 x 8.5 in	20 x 9.5 in.
Tire Size	255/45R19	275/40R20
Run Flat Tires	✓	—
Wheel Finish	—	Painted Alloy
Tire Type	—	All Season
Spare Tire Type	—	Temporary
Spare Tire Location	—	Inside Mounted

Suspension

Feature	Mercedes-Benz	Genesis
Four-Wheel Independent Suspension	✓	✓
Front Stabilizer Bar	✓	—
Rear Stabilizer Bar	✓	—

Warranty

Feature	Mercedes-Benz	Genesis
Basic Warranty	4 yr./ 50000 mi.	5 yr./ 60000 mi.
Drivetrain Warranty	4 yr./ 50000 mi.	10 yr./ 100000 mi.
Hybrid Component Warranty	6 yr./ 62000 mi.	—
Corrosion/Rust Warranty	4 yr./ 50000 mi.	7 yr./ unlimited mi.
Roadside Assistance	4 yr./ 50000 mi.	5 yr./ unlimited mi.
Complimentary Scheduled Maintenance	—	3 yr./ 36000 mi.

Frequently Asked Questions

Common questions about comparing the 2025 Mercedes-Benz S-Class and 2026 Genesis G90.

How significant is the power difference between these two luxury sedans?

The difference is substantial; the 2025 Mercedes-Benz S-Class delivers 442 hp and 413 lb-ft of torque, whereas the 2026 Genesis G90 produces 375 hp and 391 lb-ft of torque. This 67 hp advantage means the S-Class should feel noticeably quicker during spirited driving.

Is the higher price of the S-Class worth it in terms of efficiency?

Not significantly, though the S-Class holds a small edge. The S-Class achieves 24 combined MPG, slightly better than the G90's 21 combined MPG. Both require premium fuel, but the S-Class mandates it while the G90 only recommends it.

Do either of these massive sedans offer sufficient trunk space for family trips?

Both are on the smaller side for full-size luxury sedans in terms of cargo. The S-Class offers 12.8 cubic feet, giving it a minor edge over the G90's 12.0 cubic feet, which is adequate for two carry-on bags and some soft luggage.

How close are the exterior footprints of the Mercedes and the Genesis?

They are very close in scale. The S-Class is slightly longer at 208.2 inches versus the G90's 207.7 inches, and it is marginally wider and taller, suggesting similar maneuverability on city streets.

Which vehicle offers a better deal considering the feature sets provided?

The Genesis G90 represents superior value proposition; it allows you to save $25,050 while still delivering AWD and near-flagship levels of luxury and size. You sacrifice some horsepower but gain significant savings.

Does the transmission difference impact the driving experience?

The S-Class uses a 9-speed automatic, offering potentially smoother gear transitions and better highway cruising rpm management than the G90's 8-speed automatic. Both are shiftable automatics designed for refinement.