Are We in the Last Days of Diesel?

The 2018 Range Rover HSE Td6 may already be doomed. As diesel sales free-fall and European cities ban diesel vehicles, Dan Neil wonders what’s next for the world’s polluting dinosaurs

LET’S IMAGINE I work for a hedge fund as a researcher. My only purpose is to make management aware of anything in the public realm that might affect the value of the fund. By the way, since this is my scenario, I’m getting $1.5 million annually and my boss is played by Dwayne Johnson.

One day the Rock calls me to his office. “Come in, Stan. Close the door. Sit, be comfortable.”

“It’s...