Ford Explorer Plug-In Hybrid Autobahn Top Speed Test ++ How fast can you go in Ford's 457-horsepower midsize plug-in SUV? AutoTopNL puts the Ford Explorer Plug-In Hybrid (PHEV) to the test on the Autobahn. The Explorer isn't the first vehicle most people would think of testing out on the Autobahn. However, it's interesting to see how the plug-in version accelerates. PHEVs not only offer some electric range to save you money on gas (and help protect the environment), but many also deliver solid overall performance thanks to the instant torque of their electric motors. Some people call them a "gateway drug" to EV ownership.