I am not surprised that they are quick off the mark after looking at the spec between the two...
Astra Gsi Turbo.......
Performance:
Engine Size 1998 cc
Cylinders 4
0-60 mph 7.0 s
Power Output 197 bhp
Valves 16
Torque 250 Nm 184 lb-ft
Top Speed 150 mph
Golf Gti Tdi 150...........
**Performance:
Engine Size 1896 cc
Cylinders 4
0-60 mph 8.3 s
Power Output 150 bhp
Valves 8
Torque 320 Nm 236 lb-ft
Top Speed 134 mph **