Complex sentence: The Imp's engine was mounted behind the rear wheels, slanted over at 45 ° to fit, this was done to keep the center of gravity low and to minimise its effects on the roadholding of the car.
Split into simpler sentences: The Imp's engine was mounted behind the rear wheels, slanted over at 45 ° to fit. This was done to keep the center of gravity low and to minimise its effects on the roadholding of the car.