Perhaps Kia builds a better Buick, which is why we see the Buick LaCrosse as the K900’s stiffest competition.
Both offer relatively simple takes on a wafty luxury sedan without a sharp edge.
The only edge we see? The Buick now sports a mild-hybrid system that propels it toward better fuel economy.
The Genesis G80 shares a V-8 with the K900, and that’s about it.
The G80 is a little curvier and offers a potent turbo-6 that works better than the K900’s mill.
The Cadillac CT6 is a little more refined and upscale, and includes active safety features that the K900 skips.
The Acura RLX is more expensive, but has a better handle and a hybrid version that the K900 doesn’t.
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 2018 Kia K900Browse Used Listings |  2018 Acura RLXBrowse Used Listings |  2018 Buick LacrosseBrowse Used Listings |  2018 Cadillac CT6Browse Used Listings |  2018 Lexus GSBrowse Used Listings |  2018 Genesis G80Browse Used Listings |
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| Quick Specs | |||||
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The 2018 Kia K900 is a premium, luxury sedan without much of an identity. |
The 2018 Acura RLX brandishes some exotic hardware, and wraps it in anonymity. |
The 2018 Buick LaCrosse is a proper flagship, a refined and comfortable sedan with only a few quirks. |
The 2018 Cadillac CT6 has the style and performance to match its German rivals, but is the brand there yet? |
The 2018 Lexus GS is a worthy rival to its German foes in terms of luxury and handling, but its engine lineup is falling behind the competition. |
Plush, safe, and well-equipped, the 2018 Genesis G80 remains a pure luxury sedan, even as rivals get increasingly sporty. |
| MSRP From | |||||
| $50,900 | $54,900 | $29,565 | $54,095 | $46,510 | $41,750 |
| Gas Mileage | |||||
| 15 MPG City / 25 MPG Hwy | 20 MPG City / 29 MPG Hwy | 20 MPG City / 35 MPG Hwy | 18 MPG City / 30 MPG Hwy | 16 MPG City / 34 MPG Hwy | 15 MPG City / 27 MPG Hwy |
| Engine | |||||
| Regular Unleaded V-6 | Premium Unleaded V-6 | Gas I4 | Turbocharged Gas I4 | Intercooled Turbo Premium Unleaded I-4 | Regular Unleaded V-6 |
| EPA Class | |||||
| Large Cars | Mid-Size Cars | Midsize Cars | Large Cars | Mid-Size Cars | Large Cars |
| Style Name | |||||
| V6 Premium | Sedan w/Technology Pkg | 4-Door Sedan FWD | 4-Door Sedan 2.0L Turbo RWD | GS 300 RWD | 3.8L RWD |
| Drivetrain | |||||
| Rear Wheel Drive | Front Wheel Drive | Front Wheel Drive | Rear Wheel Drive | Rear Wheel Drive | Rear Wheel Drive |
| Passenger Capacity | |||||
| 5 | 5 | 5 | 5 | 5 | 5 |
| Passenger Doors | |||||
| N/A | N/A | N/A | 4 | N/A | N/A |
| Body Style | |||||
| Sedan | Sedan | Sedan | Sedan | Sedan | Sedan |
| Transmission | |||||
| Automatic w/OD | Automatic w/OD | Automatic | Automatic | Automatic w/OD | Automatic w/OD |
| Detailed Spec Comparison | |||||
| 2018 Kia K900 vs. 2018 Acura RLX | 2018 Kia K900 vs. 2018 Buick Lacrosse | 2018 Kia K900 vs. 2018 Cadillac CT6 | 2018 Kia K900 vs. 2018 Lexus GS | 2018 Kia K900 vs. 2018 Genesis G80 | |
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