Buying a full-size luxury car involves high-end features and comfort, along with a recognition of quality. The more-known Mercedes-Benz S-Class has been the premier executive vehicle for many years, but the Genesis G90 comes at it with a unique set of features and an interesting ownership proposition. These two large sedans are certainly packed with potent engines, plush cabins, state-of-the-art tech, and some of the most advanced driver assist systems on the market. However, the differences are in the details, particularly in pricing and performance, plus interior space and everyday amenities. For those shopping for flagship luxury cars, these pairs of full-size sedans have plenty to offer.
The financial comparison quickly shows how wide the gap can be between these two rivals The 2025 Genesis G90 has a starting price of $89,700, while the 2026 Mercedes-Benz S-Class has a starting price of $119,500. Comparing the two sedans beyond their base prices, we can look at the overall powertrain, fuel economy, passenger capacity, infotainment, and warranty. There’s a lot more luxury-centric features, as well as a longer warranty, in the Genesis, while there’s a higher horsepower in the standard engine, along with some more advanced technology, in the Mercedes-Benz.
1. Genesis G90 vs. Mercedes-Benz S-Class: Pricing and Value
Pricing is the most obvious distinguishing feature of these two full-size luxury sedans. The 2025 Genesis G90 has a startingMSRP of $89,700, whereas the 2026 Mercedes-Benz S-Class is $119,500. That equates to a $29,800 starting point difference, making the Genesis a more affordable entry into the flagship luxury market. Other broad new-car pricing trends also line up differently between the two offerings. The G90 has a range of $104,639 to $108,160, while the S-Class has a larger range of $131,973 to $154,585.
Luxury Sedan Pricing Highlights:
- Genesis G90 starts at $89,700
- Mercedes-Benz S-Class starts at $119,500
- Initial price gap reaches $29,800
- G90 pricing range: 104,639–108,160
- S-Class pricing range: 131,973–154,585
You can see the implication of some more expensive pricing figures in the comparison provided. A Genesis G90 costs $92,700 for a given model, while a fully-loaded Mercedes-Benz S-Class costs $189,800. Those numbers also reflect very different configurations and are not considered directly comparable trim prices, even though you can find a more fair comparison to make. Still, the overall comparison gets your consideration of the Genesis’s entry price and the Mercedes-Benz’s much-higher expenditure ceiling, though you’d want to compare equipment, powertrain and actual dealer pricing before coming to a decision.
2. Five-Year Depreciation and Long-Term Value Retention
The first purchase price is just a single part of the financial picture when buying a luxury sedan. The depreciation rate estimates the percentage of its original value a vehicle will have lost after being owned for a period of time, which is relevant in a vehicle’s resale or trade-in value. In the case of the provided five-year depreciation data, the Genesis G90 has depreciated 58.2%, while the Mercedes-Benz S-Class has depreciated 59.5%. Although the difference is slim, it does tip the scales in the G90’s favor slightly. It is worth noting that resale values can be influenced by a variety of factors such as mileage, condition, market demand, and overall market conditions.
Five-Year Depreciation Comparison:
- Genesis G90 depreciation: 58.2%
- Mercedes-Benz S-Class depreciation: 59.5%
- Difference: 1.3 percentage points
- G90 shows slightly lower depreciation
- Actual resale values may vary
Based on those published numbers, the Genesis appears to offer a marginally greater portion of value remaining at the end of the five years. But, in isolation, these percentages don’t indicate the overall price of ownership since the vehicles are introduced at various prices and may also require varying degrees of maintenance. Insurance costs, maintenance, repairs, interest rates, and resale demand are additional factors that may favor one of these models over the other in terms of overall spending. The G90’s lower starting price adds one more factor into the equation. Buyers should evaluate the depreciation in context with purchase prices, warranty coverage, service needs, and standard features for each trim.
3. Standard Engines and Powertrain Specifications
Based on those published numbers, the Genesis appears to offer a marginally greater portion of value remaining at the end of the five years. But, in isolation, these percentages don’t indicate the overall price of ownership since the vehicles are introduced at various prices and may also require varying degrees of maintenance. Insurance costs, maintenance, repairs, interest rates, and resale demand are additional factors that may favor one of these models over the other in terms of overall spending. The G90’s lower starting price adds one more factor into the equation. Buyers should evaluate the depreciation in context with purchase prices, warranty coverage, service needs, and standard features for each trim.
Standard Powertrain Comparison:
- G90 uses a 3.5-liter twin-turbo V6
- Genesis produces 375 horsepower
- Mercedes uses a 3.0-liter turbo inline-six
- S-Class produces 442 horsepower
- Both include automatic AWD configurations
The Mercedes-Benz engine makes an additional 67 horsepower over the Genesis V6, and 22 lb-ft more torque based on the specifications provided. The mild-hybrid system adds an “electric” part to the powertrain versus the Genesis version detailed above. Both sedans are automatic-equipped and all-wheel drive, two key similarities for a pair of luxury vehicles that showcase different engine layouts. These specs are part of the reason the S-Class has a higher standard output; however, other elements like acceleration, ride quality, handling, and power delivery all play into the distinction of which would be more fun to drive.
4. High-Performance Options and Maximum Power
The difference in powertrain becomes even more clear when comparing the higher power output Mercedes-Benz configuration in the supplied material. The high specification G90 example in the comparison here maintains the 375 horses from the 3.5 twin-turbo V6 and 391 lbs-ft of torque. But Mercedes-Benz offers the 4.0 twin-turbo V8 plug-in hybrid configuration in this comparison. Which is said to have 604 horses on tap, with system totals of up to 791 horses, and 1,055 lbs-ft of torque at 2,500 rpm.
High-Output Powertrain Highlights:
- G90 high-spec engine: 375 horsepower
- Genesis torque: 391 lb-ft
- Mercedes V8 plug-in hybrid: 604 horsepower
- Reported system output reaches 791 horsepower
- Mercedes torque reaches 1,055 lb-ft
That discrepancy in delivered output puts the high-performance Mercedes Benz spec far ahead of the Genesis powertrain in the comparison. Its plug-in hybrid setup mixes a twin-turbocharged V8 with electrification to bring significantly higher system power and torque. The Genesis relies on that twin-turbo V6 to strike a different balance of performance and mechanical setup. The numbers are not comparative between the two, however, so it shouldn’t be taken as apples-to-apples between similarly equipped trims. Those shopping for maximum power will want to check whether both powertrains are available in their model of interest before comparing prices.
5. Fuel Economy and Driving Range
This is another aspect where drivers who frequently travel long distances in a full-size luxury sedan need to pay close attention. The G90 has the following FHE ratings: 18 MPG city/26 MPG highway/21 MPG combined. The G90’s 19.3-gallon tank gives a range of 347.4 city miles and 501.8 highway miles. The mild-hybrid standard Mercedes-Benz S-Class has ratings of 20 MPG city/29 MPG highway/23 MPG combined. It comes with a 20.0-gallon tank and is listed with 400 city miles and 580 highway miles.
Fuel Economy Comparison:
- G90 combined economy: 21 MPG
- S-Class combined economy: 23 MPG
- Genesis fuel tank: 19.3 gallons
- Mercedes fuel tank: 20.0 gallons
- Premium unleaded fuel is recommended or required
The provided ratings give the Mercedes-Benz S-Class a boost in city/highway/combined fuel economy. Combined with its big 21.0-gallon fuel tank, it has a longer list range, which could be desirable on extended road trips. The Genesis G90 still has 26-mpg highway efficiency, which could come in handy for folks who do a lot of driving on our highway. Premium unleaded is recommended or required for the used vehicles of either make and model, which is something to consider in ownership. Mileage and range will vary by driving conditions, traffic, payload, maintenance and driving habits.
6. Wheels, Suspension, Braking, and Chassis Equipment
The chassis and wheel specs reveal how the sedans’ voluminous dimensions are balanced with features designed to enhance stability and handling. The Genesis G90 features 20 x 9.5-inch alloy wheels with 275/40R20 all-season tires. Its listed features include four-wheel independent suspension, a limited-slip center differential and four-wheel anti-lock disc brakes with brake assist. The Mercedes-Benz S-Class features 19 x 8.5-inch alloy wheels with 255/45R19 run-flat tires. Its listed features include front and rear stabilizer bars, brake drying, brake preparation and self-leveling adaptive headlights.
Chassis and Wheel Highlights:
- G90 uses 20-inch alloy wheels
- Genesis tires measure 275/40R20
- S-Class uses 19-inch alloy wheels
- Mercedes tires measure 255/45R19
- Both feature specialized control equipment
The ride of the Genesis will be a different proposition due to larger wheels and wider listed tires than the smaller wheels and run-flats on the Mercedes-Benz. But we can’t determine which sedan will be a better ride or handle quality with just the wheel sizes as suspension tuning and tire construction are also very important in a segment such as this. What is noted on the Genesis list is more independent suspension, differential hardware, and brake assist. Mercedes includes the noteworthy items of brake drying and preparation while its self-leveling adaptive headlights contribute to better visibility. The resulting driving experience will be dependent on how these pieces fit with the engines’ suspension tuning, steering, and controls.
7. Interior Space, Rear Legroom, and Passenger Comfort
The cabin in each of these sedans is luxurious, but there are a few key cabin dimensions that highlight how they differ. The 2026 Mercedes-Benz S-Class delivers 112.0 cubic feet of combined passenger space, while the 2026 Genesis G90 offers just 109.2 cubic feet. The Mercedes is 210.1 inches in overall length with a 126.6-inch wheelbase. Passengers in back are afforded 43.8 inches of legroom, 39.4 inches of headroom, and 59.0 inches of shoulder room. Genesis, on the other hand, provides a maximum payload capacity that beats the G90, along with extra front seat legroom.
Interior Space Comparison:
- S-Class passenger volume: 112.0 cubic feet
- G90 passenger volume: 109.2 cubic feet
- Mercedes rear legroom: 43.8 inches
- Genesis front legroom: 42.3 inches
- G90 maximum payload: 1,257 pounds
The G90 boasts 42.3 inches of front leg room, versus 41.4 inches for the S-Class. Its maximum payload capacity claimed in the specs is also larger at 1,257 pounds, versus 1,103 pounds for the S-Class. In terms of ground clearance, the G90 is 5.8 inches, while the Mercedes-Benz has a claimed 4.4 inch ground clearance. Conversely the S-Class has more passenger volume in the general specifications and in the rear seat dimensions in the official specs. This may be relevant depending on your specific needs whether it is chauffeur-driven rear seat comfort, front seat room, or overall capacity. Don’t forget to take your own personal preference in seating style and your luggage needs into account when analyzing the stated overall dimensions.
8. Premium Seating, Climate Control, and Cabin Amenities
Genesis G90 affords comfort to its passengers with the many standard seats specifications. Front passengers are treated to luxurious leather bucket seats which feature heating, ventilation and power massage. The driver’s seat offers 18 power adjustments compared to the 16 of the front passenger seat. The Mercedes-Benz S-Class offers 12-way power adjustments for front seats and passenger seat memory as well as driver memory. Both feature power lumbar and thigh supports but Genesis also offers reclining rear seats, split folding rear seatbacks and multi-level rear-seat heating as standard.
Seating and Comfort Features:
- G90 front seats offer heating and ventilation
- Genesis includes front-seat massage functions
- Driver seat offers 18-way adjustment
- G90 includes standard rear-seat heating
- Mercedes provides passenger seat memory
Climate Control. The G90 has a 3 zone system with rear ventilation ducts with fan and rear ventilation ducts with fan control The S-Class has dual-zone climate control; The name alone suggests that the Genesis has a focus on comfort for passengers with reclining second-row seats and rear seat heating. The Mercedes-Benz makes provision for seating memory for the passenger which ensures that seating preferences are maintained for the vehicle occupant. It should be confirmed whether the exact trim has all of the features as listed as trim equipment can differ by marketplace.
9. Infotainment, Sound Systems, and Driver Assistance Technology
Both sedans offer a large digital display, smartphone compatibility and high-quality audio systems. The Mercedes-Benz S-Class has a large 12.8-inch display that serves as the center of the infotainment system and comes with Apple Car Play and Android Auto wireless capabilities plus a half-year trial of satellite radio. The G90 features a slightly larger 12.3-inch display, wired Apple Car Play and Android Auto as well as a three-month satellite radio trial. The G90 sedan’s audio system is a 1,400-watt, 15-speaker Bang & Olufsen discrete surround sound system. The Mercedes-Benz system is 710 watts, 15 speakers with discrete surround sound as well as two subwoofers.
Technology and Audio Highlights:
- S-Class features a 12.8-inch display
- G90 features a 12.3-inch display
- Mercedes offers wireless smartphone integration
- Genesis includes a 1,400-watt audio system
- S-Class uses a 710-watt Burmester system
The safety and driver assistance systems provide yet another comparison point. Both the G70 and S-Class vehicles have blind-spot monitoring, lane departure warning, lane-keeping assist, pre- and post-collision safety systems, adaptive cruise control, and automatic parking assist. An extra feature available for the Genesis is blind-spot monitoring with side sensing, which can be helpful when navigating tight areas. Other listed features for the S-Class include front cross-traffic alert, cornering lights, integrated turn signals in mirror, adaptive headlights, self-leveling headlights, as well as the other features listed for the G70. Both models have keyless entry, push-button start, wireless device charging, heated power mirrors, and the first-row power glass moonroof.
10. Warranty Coverage and Long-Term Ownership Benefits
Warranty coverage is another obviously clear benefit to the Genesis G90 in this faceoff. Genesis includes a 10-year, 100,000-mile powertrain warranty and a five-year, 60,000-mile basic warranty. Genesis also gives owners three years or 36,000 miles of free scheduled maintenance that will cover some of the more routine service costs during that time span. The Genesis G90 also comes with five years or an unlimited number of miles of roadside assistance and a seven-year, unlimited-mile corrosion warranty. By comparison, the Mercedes-Benz S-Class has a four-year, 50,000-mile basic warranty and the same timeframe for powertrain coverage listed here with no scheduled maintenance.
Warranty and Ownership Highlights:
- Genesis powertrain warranty: 10 years/100,000 miles
- G90 basic warranty: 5 years/60,000 miles
- Complimentary maintenance: 3 years/36,000 miles
- Roadside assistance: 5 years, unlimited mileage
- Mercedes warranty: 4 years/50,000 miles
A difference in warranty coverage may be a consideration when purchasing the vehicle long-term. The Genesis beats out the Mercedes-Benz with more listed powertrain coverage, longer basic warranty, and free scheduled maintenance along with roadside assistance and corrosion warranties that can be considered a value for buyers. Mercedes-Benz however beats the Genesis with a shorter comparison based warranty and not including free scheduled maintenance. The buyer should also consider the exact warranty coverage, exclusions, transferability, and regional differences for each manufacturer before purchase. Looking at the value of the two vehicles, the G90 has a lower starting price and a generous amount of comfort features along with longer warranty protection while the S-Class offers more standard engine power, slightly better listed fuel economy, and more passenger volume.
