Good bit of casting Pixar!
Who can take you higher than a twin peak mountain blue?
Jeremy Clarkson and Jeremy Piven are both listed as voices in the IMDb database, but only Piven is listed in the movie credits.
"A .22 caliber mind in a .45 caliber world"
That was a good casting choice.
"Just between the two of us, it's mostly for Fluttershy."-Discord
Listen to the voice. It's not Jeremy Clarkson.
"When you come to a fork in the road, take it." - Yogi Berra
From the Trivia section:
The voice of Lightning McQueen's agent Harv is provided by Jeremy Piven who also plays Vincent Chase's agent in the TV-series Entourage (2004). The UK release featured the outspoken Top Gear (1978) host Jeremy Clarkson as the voice of Harv.
Hitler! C'mon, I'll buy you a glass of lemonade.
I'll bet he was good at the part. Was the dialog the same?
"I’ve had a perfectly wonderful evening. But this wasn’t it." - Groucho Marx
Here's a behind the scenes on recording his voice
https://www.youtube.com/watch?v=mp5bLQswHIA