I agree 100% with MOG 615:
I had an S2 3.0L Roadster and felt the power was enough fo the live rear end. Now, with a 370 odd bhp Plus 8 the power to weight ratio is close to 345bhp/tonne, but it has a much more modern suspension and 245 profile tyres. I can get the back to move if I try, but on the road drive it well within its limits.
A track day at Castle Combe and a Hill Climb school at Gurston Down convinced me that I am not skilful enough to drive the car at its limits..which are very high. The track day was interesting, the big 6 pot AP Racing front brakes slow the car far, far more quickly than the trads, so I was braking later than almost everyone, other than the Caterham drivers.
Brake late and hard, slowish through the corners and then lots of power out seemed to be best for me.
Also 50 years on two wheels taught me a lot about reading the road and grip. Losing either or both ends on a bike has rather more consequences than in a car.
The car is tyre sensitive too, it came with Avon ZZ3, but now has Michelin Pilot Sport 4 S and since they went on last year I have failed to get more than a slight twitch when pulling out of a side turning rather spiritedly. My feeling is that 50% wear on the back is the limit.