Well according to Parkers
HERE, most are around 12 seconds 0-60 while the higher power ones are 10 seconds @113bhp. A remap could bring you up to 130-140bhp so 8 seconds should be possible I believe. You could get there quicker if you really pushed it, but then it's not worth blowing piston rings for a few seconds of rush.
What I love is the fact that you can get 50-55mpg when you're sensible from a 1.8. Diesel might be a penny more expensive, but if you do the math, you're gonna save some money. Which servicing will probably swallow, but at least you get the bigger engine.