That one obv aint road legal/registered, but most 6R4 rallycars are, as they have to be.
And the engine is the basicly the one used in the Jag XJ220, just without the turbos.
Apart from some, like Will Gallops old Hill Climb one, which is over 900bhp with a modded XJ220 lump
BTW i know where theres a XJ220 engine for sale if anyone fancies it