May have posted something like this in the past, so apologies but I couldn't find it.
For a mkIV Astra dti which would be better, considering factors of:
-Grip
-Low rolling resistance
-Longevity
-Noise
in roughly that order?
The Energy could be 175/70/r14 or 185/65/r14, the Conti only the latter I think.
Cheers,