The injectors won't fire until it sees a good cranking speed so a bump should help with that if you've wrecked the new battery with a broken alternator. 
It is odd though, there's not much you actually need on a HDi to get it started, as long its getting fuel pressure, turning over quick and sees cam/crank sync it should fire. Keeping it running well after that is a different matter lol.
It is odd though, there's not much you actually need on a HDi to get it started, as long its getting fuel pressure, turning over quick and sees cam/crank sync it should fire. Keeping it running well after that is a different matter lol.