A fleet of battered old bangers set off from Devon on Friday at the start of the Plymouth-Dakar rally.
Dick Dastardly and Penelope Pitstop are competing in the 'Pink Peril'
While the famous Paris-Dakar rally is the ultimate test for man and machine; the Plymouth version is a challenge for cars that have seen better days.
The wacky racers will drive across seven countries in 20 days as they head for the Sahara Desert in aid of charity.
Competing cars must cost less than £100, preparation expenses are limited to £15m, and once the rally is under way, no outside support, mechanics or back-up trucks are allowed.
Among the vehicles aiming to cover the 3,700 mile journey is a Bedford ice-cream van, a 1962 Ford Corsair and a rusting Hillman Hunter.
The organisers emphasise that "participants are on their own". There is no official back-up to help ease the way across tricky border posts and there are no arrangements for medical emergencies.
The rally is the brainchild of Exeter stockbroker and car-wreck enthusiast Julian Nowill.
"If you have a sense of adventure but relatively little cash, then the Plymouth-Dakar Challenge might be up your street," said Mr Nowill.
"It's cheap, cheerful and fun, and it's taking the mickey out of the Paris-Dakar rally."
The Challenge is intended to benefit about 100 charities across the Gambia.
At the end of the three-week adventure, any vehicles still running will be donated for use by charities and the remaining cars and equipment will be auctioned off.
Forty-five cars took part in the inaugural event at the start of 2003, but this time there will be 141 vehicles.
The number of entries means there will be three separate start days - 19 December, 26 December and 1 January.
The route starts in Plymouth, heads across France and Spain to Gibraltar, and then down through Morocco, the Sahara, Senegal and Gambia.