Range-topping BMW 1 series gets new engine

The range-topping 1 Series 135i will get BMW's new TwinPower turbo engine this year, replacing the current twin-turbo unit.

It's the same single-turbo straight-six unit already seen in the 5 Series GT, but there'll be no extra grunt for the quickest 1 Series; the new engine outputs the same 302bhp and 295lb ft torque.

However, with BMW's plans to produce a 1 Series 'M' car, it will mean more room for manoeuvre on the potential M's power, by keeping the 135i around the 300bhp mark.

As well as the new engine, the 135i can also be specified with BMW's new 7-speed DCT twin-clutch transmission