BMW 135i Switches From Twin To Single-Turbo Powerplant
In a continuous effort to improve the 1-Series, BMW announced at the Detroit motor show that it’s latest TwinPower twin-scroll turbo engine will find its way into the 1-Series range topper – the 135i. Coded the N55, the new single-turbo straight-six engine replaces the current twin-turbo unit (N54) in the current 1-Series. The N55 single …