Although mine's not for sale (yet), most of the 4 door Skyline around are 2 litre. There are 2.5 n.a. (mine) and 2.5 turbo models about but there seem to be less of them.
Insurance is a big problem though for you if you are only 21, one insurance company treated my car as Group 18 insurance.
Hopefully you will fulfill your dream though, maybe just not as soon as you'd hoped.
Im hoping to be able to find the 4 dr 2.0 ltr model. Baciase, as you say the insurance is a nightmare, although, my Cavalier insurance covers me third party only on any other car that i am driving, so at least I can be road legal in it!
Paul Palmers car will still be a bitch to insure. Sorry mate but one the reasons that the skyline is so special is that it cannot be insured by everyone. I still struggle to get quotes and have to pay a fair amount of cash even though I am 36. I thought that my insurance problems ended at 25
One of the few good things about being old. Wait until I am as old as Peter E (no offence meant Peter ). He pays under £1k a year
I have (well they are my mates actually but I am looking after them) two 4 door R33 GTS's both 2.0 models for sale, one in Silver (L reg) the other Black (N reg & only 12k on the clock with history) price is negotiable and well worth it. Let me know if you are interested, or indeed if anyone else is interested, and I will let them have as many details as they can handle !!