Fair point, well made, however they could lengthen the gears a bit to compensate for the lack of rev's but i suppose that most modern diesel can't really maintain the big torque across the rev band because of the tiny turbo's they have, twin turbo's help but haven't really solved the problem,
I know this is a point I shouldn't mention because it cause's a lot of arguments, but I still believe that diesels are still somewhat "rained in" so that they aren't as quick as there petrol counterparts, I believe that this does have something to do with it,
Diesels are always made for low down torque and bigger numbers, however (and it can be done) if they sacrificed just a bit of low down torque (and trust me you probably wouldn't notice) so it can be used else where then you could build yourself a genuinely drivable indecently fast car that could produce big torque across it's whole rev band and still do 40 mpg, I'd love the opportunity to prove that I'm not talking out of my arse, I have a distinct lack of funding for the job