A drive system for a vehicle for variable distribution of torque, from a primary input and secondary input, between a left wheel and a right wheel of a vehicle, the drive system comprising a first and second torque output shaft, one for each of the left wheel and the right wheel, an open differential, and independently controllable first and a second clutch packs, characterized in that the drive system is configured such that - torque from the primary input is transferred to each of the torque output shafts (20, 30) via the clutch packs (50, 52), wherein the first clutch pack is configured for variable transmission of torque between the primary input and the first torque output shaft, and the second clutch pack is configured for variable transmission of torque between the primary input and the second torque output shaft; - torque from the secondary input is transferred to each of the torque output shafts (20, 30) via the open differential that is an open planetary differential configured such that torque from the secondary input is transferred via a ring gear of the open planetary differential to a planet carrier of the open planetary differential and to a sun gear of the open planetary differential, torque is transferred from the planet carrier to the first torque output shafts, and torque is transferred from the sun gear to the second torque output shafts; - torque from the planet carrier of the open planetary differential is summed with torque from the first clutch pack output in the first torque output shaft; and - torque from the sun gear of the open planetary differential is summed with torque from the second clutch pack output in the second torque output shaft, wherein the central axes of rotation of the open differential, and of the two torque output shafts (20, 30), and of the two clutch packs (50, 52)are co-axially aligned. - torque from the primary input is transferred to each of the torque output shafts (20, 30) via the clutch packs (50, 52), wherein the first clutch pack is configured for variable transmission of torque between the primary input and the first torque output shaft, and the second clutch pack is configured for variable transmission of torque between the primary input and the second torque output shaft; - torque from the secondary input is transferred to each of the torque output shafts (20, 30) via the open differential that is an open planetary differential configured such that torque from the secondary input is transferred via a ring gear of the open planetary differential to a planet carrier of the open planetary differential and to a sun gear of the open planetary differential, torque is transferred from the planet carrier to the first torque output shafts, and torque is transferred from the sun gear to the second torque output shafts; - torque from the planet carrier of the open planetary differential is summed with torque from the first clutch pack output in the first torque output shaft; and - torque from the sun gear of the open planetary differential is summed with torque from the second clutch pack output in the second torque output shaft, wherein the central axes of rotation of the open differential, and of the two torque output shafts (20, 30), and of the two clutch packs (50, 52)are co-axially aligned.