Had the car for a while, its done 75k but when it reaches about 3000rpm, there appears to be a slight hesitation, it has been like this for a while and until now has just been a little annoying.

Took the car out today and when it reached about 2500rpm the car seemed to lose all power, this was only for a split second and then all appeared to be fine again

any ideas what this could be?

Any help would be much appreciated