One is a an outspoken, speed-loving presenter with a penchant for fast cars.
The other is a gentle-humoured, travel journalist who enjoys nothing more than a ride on the back of a camel.
Now it seems Jeremy Clarkson and Michael Palin are about to meet head on.
Palin is president of Transport 2000 which claims that Clarkson's BBC2 Top Gear series encourages irresponsible driving, promotes speeding and should be taken off air.
Using Clarkson as a presenter with his distinctive image risks encouraging a yobbish attitude on the road, it adds, and glamorises speed.
It should be replaced by a programme that promotes sensible driving in greener cars, says the campaign group.
Palin, a former Monty Python star, has a string of TV hits to his name including Himalaya, Sahara and Pole To Pole.
Clarkson's Top Gear attracts 5million viewers a week.
A spokesman for Palin's group said: "If we must have Jeremy Clarkson on TV, let's give him something useful to do such a trying out public transport or road-testing new bicycles."
A BBC spokesman said Top Gear took safety very seriously adding: "None of the presenters advocates or encourages dangerous driving."
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