F13 640d pulls on acceleration

[Big G 1979]

Got my F13 640d alignment done today as car was pulling tonight under acceleration - looks like it needed done I had them check the car over for any loose/worn bushes prior to performing the alignment however it still pulls.

Only pulls under hard acceleration to the right almost as if once the weight is taken off front axle.

Is this a normal trait of the 640d (car is new to me) or could it be runflats? If cruising or on de-accelation car goes perfectly straight.

Please note this car is new to me as recently bought it and have nothing to compare against (ie. Was good not not) maybe it's torque steer? If it's normal then I know

Open to suggestions