The Pressurized Navajo, later named PA-31P Mojave, is a pressurised version of the standard PA-31 Navajo piston twin. The air conditioned cabin is pressurised to 5.5 psi. It has a similar interior but a longer nose and slightly smaller windows than the Navajo and with higher powered 425 hp Lycoming TIGSO-540 engines has 15 kts more speed at 243 kts.