Infiniti QX80 2024 Price in USA Starting From USD 70,000 to USD 79,000. The Infiniti QX80 2024 is a new 7 seater SUV Car that comes with a 5.6L V8 Gas Engine, 400 hp Power, and 413 lb-ft of engine. Depending upon the variant and fuel type the Infiniti has a mileage of 20 MPG.