In what regards mrk? Fuel type doesn't affect performance if the power figures.match up 
Agw: rolling start takes away the astra's main advantage, as you go faster weight matters less! From looking on vxr forums they need 340+ bhp to get into low 13s quarter miles, guys with identical tuning to mine have managed a 12.9 and many 13.0s

Agw: rolling start takes away the astra's main advantage, as you go faster weight matters less! From looking on vxr forums they need 340+ bhp to get into low 13s quarter miles, guys with identical tuning to mine have managed a 12.9 and many 13.0s