whats your budget,td5 been later generally better vehicle ,and by far the most powerful ,proper 200 very good but not many around ,300 i think the best designed lr engine
300 tdi all the way! More refined than the 200, and still servicable and reliable unlike the TD5...which is a little more fussy. You can run a tdi on veg oil if you are that way inclined too.
Not fast, but a well maintained one isn't what I would call sluggish. They keep up with traffic, put it that way.
200 or 300 will do 90 ,are the most economical ,but can be sluggish by todays std,tdg pulls from the start but less economical ,will cost more to maintain ,id go 300
no 110 better vehicle and cheaper unless you want csw,main thing is good body work engine could easily be changed ,bodywork much harder
bodywork especially bulkhead