Summarize

BMW has let the cat out the bag on its M340i set to make its debut at the Los Angeles motor show at the end of the month. The new 3-Series performance flagship sits above the 330i in the upcoming G20-generation 3 Series range and M340i is the first 3-series to have its numerals preceded by and M.

And it shows too M340i's all-new lightweight aluminium3-litre straight-six gets revamped turbocharging improve fuel efficiency and turbine response as it delivers a significant 275kW and 500Nm — 30kW and 50Nm up on the old car to deliver a 4.4-second 0-100 to even beat the acceleration ability of the M2 Competition.... 

Packing BMW’s xDrive all-wheel drive and a tuneable M Sport differential, M340i sits 10mm lower and has a wider track than other 3 Series models and M tuning extends to the 348mm front and 345mm read disc brakes with M-branded callipers and 18-inch alloy wheels wrapped in a choice of performance-oriented tyres, while electronically controlled dampers come as part of the optional Adaptive M suspension system. 

Extra optimise both the cooling air supply and aerodynamics” while model-exclusive styling elements include a colour-coded rear spoiler and trapezoidal exhaust.