Can vehicle enthusiasts expect an earlier release date for the 2018 Jeep Wrangler after another sighting in the United States?

Just last May, Jeep started testing its fourth generation Jeep Wrangler. Last week, however, Motor1.com reported that the 2018 Jeep Wrangler was again spotted being tested under the harsh conditions of the Death Valley in Eastern California—considered to be the lowest, driest and hottest area in North America.

The same website also reported that the 2018 Jeep Wrangler will maintain its old-school appeal, with little changes in the design department. The boxy silhouette will be retained in the upcoming 2018 Jeep Wrangler, with only minor tweaks like repositioned side mirrors now placed a bit higher compared to the current model.

As promised by Jeep's chief executive officer Mike Manley, the upcoming vehicle's design will also be more lightweight and aerodynamic, with aluminum rumoured to be tapped in some parts to shave off some of the weight. As vehicle enthusiasts very well know, a lighter 2018 Jeep Wrangler will translate to greater efficiency.

Indian Autos Blog also reported that the 2018 Jeep Wrangler will be smaller compared to the existing model. The upcoming Jeep Wrangler will also reportedly ditch the folding windshield for a more raked, fixed windshield, which is expected to help improve the vehicle's aerodynamics. The website also confirmed that the round headlights and trapezoidal wheel-arches will be retained.

Although little seemed to have changed in the 2018 Jeep Wrangler's external appearance, what hides underneath may surprise even long-time fans. Citing spy images of the vehicle being tested, Motor1.com reported that the new Jeep Wrangler will have a more powerful, turbocharged engine, which will be available alongside the familiar 3.6-litre V6.

The new engine, which is rumoured to be called "Hurricane," is expected to work with an eight-speed automatic gearbox sending as much as 300 horsepower on the road.