MG Rover's L series turbo engine has been upgraded to give 11 per cent more power and 8 per cent more torque – but with no penalty in CO2 emissions. Power increases from 101 to 113Ps and torque from 240 to 260Nm.

The new engine, which will be available in January in the MG ZR and ZS, Rover 25 and 45 models, has a CO2 output of 150g/km, which is identical to the current 101Ps model.