Porsche 718 Cayman GT4 Coupe 2024 Price in USA Starting From USD 143,650 to USD 183,650. The Porsche 718 Cayman GT4 Coupe 2024 is a new 2 seater Coupe Car that comes with a 4.0L Flat 6 Gas Engine, 414 hp Power, and 309 lb-ft Torque of engine. Depending upon the variant and fuel type the Porsche has a mileage of 23 kmpl.