Go read some reviews of 4WD cars - Audi, Subaru, whatever. The recurring theme you'll find is reviewers saying 'intensely competent and fast, but very dull'.
The last thing my Syncro is, is dull. It still needs a bit more power to make it properly entertaining, but it's a 4WD car, which is all about gentle slip-angles - it can be put into a four wheel drift and controlled on the throttle. That's a driving on road/track drift, not a lurid drift-racing drift. It's the 4WD version of lift-off oversteer - far more control-able and as much fun. Far more fun in the wet, actually.
A big-power motor would be a lot faster, but would I have any more fun and would the car be as grin-inducing to drive? Possibly not. Would I get through lots more tyres, fuel and brake pads? Definitely.
I've done four track days and eight laps of the 'ring (and there and back) and I've not changed the front brake pads yet and I don't drive like a pussy, either. I also have two kids and lots of other demands on my cash. Not burning huge amounts of cash running my project and still having a lot of fun is a major feature.
If you do buy a Syncro, bear in mind that the drivetrain is substantially lighter-weight and less durable than a Rallye or G60 Syncro - it's rod-change gearbox, rather than cable-change etc etc and you'll not be able to put much more grunt through the gearbox before it goes pop. That's OK - I have a couple of spare rod-change 'boxes here though
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Syncro is only VW's 80s-90s brand name for 4WD. Sometimes viscous-coupling controlled (Transporter of Golf), sometimes torsen diff-controlled (Passat).
The 5 door carb version was the only RHD version available. They only sold 650 of them, but they mostly went as second cars to terribly nice people, or to old farts, who live down rough old lanes, or up mountains - people who wanted the 4WD to make sure they got home, or got away from home. Given the demographic of these people the Syncros are still popping out of the woodwork as these old buggers die off, or trade up to a Subaru. Judging by the amount of dog-hair in the back of mine (still in some folds in the bodywork of the boot) it spent the first 15 years of it's life taking laboradors out for their walk. Terribly nice people, see. If only they knew.....