at the heart of the polo gt g40 was its 1.3 litre g40 engine (engine id code: py). it displaced from a cylinder bore of , and a piston stroke of . the g40s 'g-lader' supercharger had a displacer width of , hence the "g40" name. this g40 engine produced a maximum power output of at 6,000 rpm, and torque of at 3,600 rpm.