My brother owns a last of the line limited edition Integrale Evo II (reg 1995) (Lagos blu) - it has 215bhp (the same as the rest of the Evo IIs), 4WD, turbo and is bloody fast! We have raced each other on numerous occasions and i get hammered nearly every time! Off the lights you will prob stay close in a Williams / 172 cos many Integrale owners do not do full throttle standing starts cos the clutches often pack up completely with too much abuse. However, if you meet one on the move (and on the twisties) I am sure they will win every time. Theyve got a hell of a lot of torque and the grip and handling is unbelievable - they can be scarily quick around B roads! And yeah, they look absolutely awesome - ludicrously flared wheel arches, bonnet bulges and vents.
Lancia does have a notorious rep for their cars rusting, but if you go for the Evo II cars (93-94) (hand built at a different plant) you shouldnt have any problems. Anything pre 92 Evo 1 is likely to have rust somewhere (around the windscreen/ door bottoms/ tailgates)- but the situation is not as bad as is to be made out.
I may sell my Williams next yr and by my bros Integrale off him as I love them!