Ok so i've bought myself a 1998 S reg Pug 306 its a 1.8i GLX is this the DOHC 16v version or what ? Multiport ?

Please could you tell me the engine specific like Valves, Bhp etc as i cannot seem to find out and there are no stickers on it indicating exactly what it is and i need to find out to purchase an uprated filter, It is a 5 Door if that helps thanks