if its a 340 your limited to 1.4 or 1.7, 1.4 is 70hp and 1.7 82hp but the 1.7 is a livly car imo
but if you want a bit more there is the volvo 360! 2.0 with 100hp-+ which uses a volvo redblock engine and can be tuned alot even turboed without much hassle.
also the 1.7 is good for clio 16v engine conversions! quick 140bhp that can be tuned up!
i have a 1.7 and loved it as a 1.7 but now has 1.8 16v power and i love it even more.
they go round corners well too, due to having the gearbox at the back and 50/50 weight distro.