Yep, it's a Renault 5 GT turbo. Fun cars back in the day, but because of the small 1.4 turbo engine, insurance wasn't to bad, but the engines could produce a lot of hp if done right (or blow head gaskets every week if not). This led them to become a boy racers car. I've worked on some dreadful examples lol
I actually have that Ali-G film on DVD! He was a funny bloke in his early stuff. But I'm not sure it will travel well outside the UK.
Good find, will have to fire up the DVD player now, bang goes my afternoon!
-Gavin