2002 VOLVO S40 2LITRE PETROL QUEERY?

I OWN A VOLVO S40 2002 2L PETROL. I have been told that there are 2 types of engine that it could be either a volvo engine or a renault engine. Does anyone know what kind of engine mine is i have looked in the net but cant find out about it. The engine number begins B4202******* Please i need to know...