VS
At a Glance
Power
409hp @ 5800
496hp @ 5500
Torque
405lb-ft @ 1300
516lb-ft @ 2000
Fuel
20 mpg est.
22 mpg est.
Engine
3.5 L/212ci
4.0 L/243ci
Choosing between the Genesis G90 and the Mercedes-Benz S-Class is one of the most common decisions car buyers in the United States face. The Genesis G90 delivers 409hp @ 5800 while the Mercedes-Benz S-Class produces 496hp @ 5500. On fuel, the G90 returns 20 mpg est. while the S-Class uses 22 mpg est. — important in a market where fuel prices change monthly. Pricing starts at $103,000 for the G90 and $119,550 for the S-Class. Both vehicles have their merits. The right choice depends on your priorities: fuel economy, performance, towing ability, safety features or total cost of ownership. This comparison covers every specification available so you can make an informed decision.
Specification
Genesis G903.5T e-SC AWD 2026 - From $103,000
Mercedes-Benz S-ClassS 580 4MATIC Sedan 2026 - From $119,550
Performance
Power Output (hp)
409hp @ 5800
496hp @ 5500
Torque (lb-ft)
405lb-ft @ 1300
516lb-ft @ 2000
Engine & Drivetrain
Engine Capacity
3.5 L/212ci
4.0 L/243ci
Engine Layout
V
—
Cylinders
6
8
Forced Induction Device
—
Turbocharged
Transmission
Automatic w/OD
Automatic
Number of Gears
8
—
Drive Wheels
All Wheel Drive
All Wheel Drive
Fuel Economy
Fuel Economy (Combined, est.)
20 mpg est.
22 mpg est.
Fuel Economy - City (mpg)
17mpg
17mpg
Fuel Economy - Highway (mpg)
24mpg
27mpg
Fuel Tank Capacity (gal)
19.3gal
20gal
Dimensions
Length (in)
207.7in
209.5in
Width (in)
76in
76.9in
Height (in)
58.7in
59.2in
Wheelbase (in)
125.2in
126.6in
Curb Weight (lbs)
5126lbs
4795lbs
Safety
ABS
✓ Standard
✓ Standard
Brake Assist
✓ Standard
✓ Standard
Stability Control
✓ Standard
✓ Standard
Traction Control
✓ Standard
✓ Standard
Driver Airbag
✓ Standard
✓ Standard
Passenger Airbag
✓ Standard
✓ Standard
Side Airbags Front
✓ Standard
✓ Standard
Curtain Airbags
✓ Standard
✓ Standard
Features & Tech
Air Conditioning
✓ Standard
✓ Standard
Climate Control
✓ Standard
✓ Standard
Cruise Control
✓ Standard
✓ Standard
Adaptive Cruise Control
✓ Standard
✓ Standard
Bluetooth
✓ Standard
✓ Standard
Backup Camera
✓ Standard
✓ Standard
Rear Parking Aid
✓ Standard
✓ Standard
Sunroof
✓ Standard
✓ Standard
Heated Seats
✓ Standard
✓ Standard
Power Seat Adjustment
✓ Standard
✓ Standard
Keyless Entry
✓ Standard
✓ Standard
Alloy Wheels
✓ Standard
✓ Standard
The Verdict
Which Wins?
Overall Winner
Mercedes-Benz S-Class
2 / 4 categories
Performance
S-Class
Fuel Economy
S-Class
Value
G90
Practicality
Tied
Pros & Cons
Genesis G90
Lower starting price ($103,000)
Higher fuel consumption (20 mpg est.)
Mercedes-Benz S-Class
Better fuel economy (22 mpg est.)
Higher starting price
Frequently Asked Questions
Which is more fuel efficient, the G90 or S-Class?
The G90 gets 20 mpg est. and the S-Class gets 22 mpg est. on the combined cycle. The S-Class is the more fuel-efficient choice. In real-world conditions with a mix of highway and urban driving, actual figures will be slightly higher.
Which has more power, the G90 or S-Class?
The G90 produces 409hp @ 5800 and 405lb-ft @ 1300 of torque while the S-Class delivers 496hp @ 5500 and 516lb-ft @ 2000 of torque. The S-Class is the more powerful option.
What is the price difference between the G90 and S-Class?
The G90 starts from $103,000 and the S-Class from $119,550. The G90 is cheaper by $16,550 at this variant level. Final on-the-road pricing varies by dealer and specification.
Should I buy the G90 or the S-Class?
It depends on your priorities. If fuel economy matters most, check the mpg figures above. If you need towing capacity, compare the towing ratings. For day-to-day driving - commutes, school runs and highway trips - consider ground clearance, service network coverage, and total cost of ownership including insurance and maintenance. Use the spec tables above to compare every detail before making your decision.
Also Consider