Gov. Arnold Schwarzenegger is headed to MTV to promote Earth Day with an 800-horsepower car that runs on renewable biodiesel fuel.

The governor’s appearance on a special Earth Day episode of the popular show “Pimp My Ride” set for Sunday is the latest environmentally themed event for Schwarzenegger, who drew international attention for signing a global warming law last year.

For the show, videotaped earlier, mechanics installed the powerful engine in a converted 1965 Chevy Impala, producing a vehicle that accelerates from ...