The way i see it is if you do alot of miles and are not 100% bothered about ultimate performance, dont mind the sound of a diesel engine then 95% of the time the diesel will have more than enough performance for everyday driving on public roads.
I think a standard LCR will out perform a standard pd150, a mapped diesel will keep up with a standard LCR, MAYBE slightly quicker between 50-70, but a remapped LCR will kill a mapped diesel 150 any day of the week, and im not talking on public roads, someone can keep up in a much less powerfull car on public roads because of all the hazards it just aint safe, go get on a track and see then what happens.
And yes ive had both diesel and petrol so im not biased either way.