Hot hatch you want a revvy 4-pot with 16 valves + turbo or supercharger and 200 bhp+ if the chassis can take the torque. Don't want a torque steering nightmare like the MG Maestro Turbo or 220 Coupe Turbo.
Can't remember what do they put on the cam cover of the "MG" models - not "Rover" obviously?
Very smooth and quiet with a hell of a lot of grunt. Rover trademarks of midrange and power.
Although, on my R75 I would say that the honda 27's are a little more urgent towards the redline, getting quicker and quicker whereas the KV6 seems to produce the same output from 4 - 6.5 K. Probably due to a heavy flywheel and relatively long stroke, although it has a better head design with 4 cams.
Something you will notice is that they really have sorted the drivetrain (engine mounts/engine management throttle damping, etc, etc) so you are able to come off and on the throttle causing virtually no kangaroo, or drivetrain "Jerk"