There�s life in the Bolero yet. Mahindra has just upgraded India�s most popular MUV by giving it a low-cost common-rail system. There�s a minor facelift too, along with some interior updates.The Bolero is powered by the same capacity 2523cc diesel engine as before. Only, now it comes with a common-rail motor to make it more efficient and to improve drivability. At 63bhp and 19.8kgm of torque,