The R26.R is INCREDIBLY quick around a track - the R26 isn't far off though. In fact I'll probably invite scorn but I would expect one to give a 335i/d a run for it's money. Not massive power but a very track friendly chassis. Awesome cars for the money. And way quicker than a Clio!
E91 335d SE Touring
Also Land Rover Puma Defender 110 XS station wagon