I have never felt that the zed has too much power or its unusable on UK roads. The only thing id have preferred is if Nissan had altered the final drive, to lower the top speed and increase acceleration. Whats the point of having a car that could probably hit 170/180mph but restricting it to 155, when in reality your never likely to ever reach anything near that sort of speed in real life.
I have several times wondered if i bought the wrong car. However, that was purely because up until this last month I was doing about 2000 miles a month in it, most of which was stuck in traffic on my daily commute and I also worked out the car was costing me around £950 a month - with £500 or more of that being just fuel. - which is more than my mortgage costs me. When your stuck in traffic doing 30mph, unable to use the performance of the car, whilst watching the fuel gauge dropping like a rock you do wonder if its the right choice.
However, this last few months ive been lucky to have use of a old diesel shed, which saves me £300 a month on fuel alone, and now when I drive the zed, i enjoy it a whole lot more. I now get that same buzz I got when i first drove the zed, everytime im in it again.
You can rectify that easily. A simple job of changing the Dif for one with a lot more teeth could in effect give you the equivalent of 80 - 100 more BHP. but will lower the top end. They are selling recon ones on Fleabay under the Nissan 350 section for £450. Hence buses can get away with a piddly engine by using a lower ratio gearbox. But can't get much over 40 on a run. I prefer to get ABBEY to play with mine:)