It follows the recent upgrading of the 335i to the 340i with an up-powered version of the 3-litre turbo six-cylinder petrol engine.
From July production, which should be in showrooms around October, the current M235i’s outputs of 240kW/450Nm will be raised to 250kW and 500Nm in the new M240i, which matches the muscle of the 1 Series M Coupe that was built from 2011 to 2012.
The M240i will be available with a choice of six-speed manual or eight-speed automatic transmissions.
Driven :BMW M2 is fast, grippy, vocal.
The power injection improves the 0-100km/h sprint by 0.3 seconds (the 240i now does the deed in 4.8 seconds in manual and 4.6 seconds in auto), whilst fuel consumption and CO2 emissions are also said to be 7 percent improved.
Identical upgrades are being made to the five-door BMW M135i, which becomes the M140i.
Lower down the pecking order, the four cylinder 2-litre turbo petrol engines also get a boost with the 120i /220i and 125i gaining an extra 5kW to produce 135kW and 165kW respectively.
The most powerful four-cylinder derivative, the 228i, will become the 230i with a power increase of 5kW to 185kW.
Also from July 2016 orders, three new features from BMW Connected Drive, which were previously only available for the BMW 7 Series and BMW 6 Series, will also find their way to the BMW 1 Series, 2 Series Coupe/Convertible, 3 Series and 4 Series. These include a new menu display and higher screen resolution for the infotainment system, and optional wireless smartphone charging. The speech recognition feature will also recognise normally spoken sentences instead of predefined text instructions.