oh well I'll join in now
all TD's will produce some smoke at some point, most of the smoke mentioned is either under acceleration, or all the time, if its all the time and blue - its engine oil, engine needs attention. if the smokes black under acceleration, black is unburnt diesel, so its overfueling, or its overfueling waiting for the turbo boost to come up.
I must have a old diesel, however it only smokes for the first couple of hundred yards in a morning, blue under hard acceleration, mostly when cold.
the engines have different strong points, I have a 1988 defender with a 2.5l TDi engine, my other engine option was a 3.5l V8 petrol, I would love a petrol for everyday running, but I have not because; I can get 30mpg from the TDi, the TDi is not sensative to water and being submerged (just keep the air intake dry!), the cost of running is also a huge point, setting up the petrol can also be a pain especially for LPG, the petrol version is cheaper to buy, the same price to insure, however I have the more expensive tdi,
for landrovers at least, diesel is the way to go, I can prove this as TDi engines complete can go for £1000, even if its 10years old.
also for one of the people with the most tractor like car on here, I can assure you I can never smell the diesel unless I camp next to the exhaust, although I can often smell petrols I follow!