lovely stuff, Richard.
by some quirk of fate it's rocking a K series
more @
http://www.imps4ever.info/cars/sunbeam/stiletto/mkt_248f/mkt_248f.html
i (lord knows how) walked away as passenger from an imp losing it's back end at 60mph, off camber drop, rolled, ending up in a river, nose up, and we climbed out through the windscreen aperture.
so 100bhp would clearly be entertaining at least.