Sungwoo Lee has published his UE4 automotive scene and the best thing is that the pack is free!
“I’m planning a personal project which needs a good visual for vehicles. so I made such an example scene for the test. This package is still in an early stage and I will continuously update to make it more and more complete,” wrote the artist. “I currently have such a roadmap below you can check it out. If you have any suggestions you may leave a message on my Artstation.”
You can learn more and get the pack here.