Angry boy racers have attacked a police car in Christchurch, kicking in the doors and smashing its windows, according to witnesses.

A large crowd gathered for the "Aves Invasion Weekend" promoted on Facebook, with around 1600 people saying they planned on attending.

But the event disintegrated into "anti-social behaviour" on Saturday night as the hoons began doing burnouts and skids on the road.

Police were called after receiving reports of the disturbances but faced an angry group.