Ah,you'll be refering to the lovely G-AJPI (USAF 314887),I've got some very fond memories of flying in her,a mate of mine used to own a share in her about 6/7 years ago when it was based at liverpool,unfortunately shortly afterwards the undercarriage collapsed on landing at Liverpool,leaving a bit of a mess but it was all repaired by Liverpool based 'Keenair'back to its glory as can be seen now.
There are two Engine variants of the Argus,the Ranger (165hp) which is in G-AJPI,and the Warner super-scarab(145hp),the majority have the more powerful Ranger.
As for performance,I've never known a single with as much lifting power,Full tanks and almost 4 people can operate comfortably out of small grass strips.
Ah if only times where different,I'd definately be considering her for myself.
Incidently the t/p nos given in pilot is :-
01603 754272 (Day)
01603 893328 (Night)
Good luck,you'll have a lot of fun with her.