BMW B48


The BMW B48 is a turbocharged inline-four petrol engine which replaced the BMW N20 and has been in production since 2014. It was first used in the F56 Mini Hatch and has been used in BMW applications since 2015.
The B48 is part of a modular BMW engine family of 3-cylinder, 4-cylinder and 6-cylinder engines, which use a displacement of per cylinder.

Design

Compared with its N20 predecessor, the B48 uses a more undersquare design. As per the N20, the block and head are made from aluminium. Other features shared with the N20 include a twin-scroll turbocharger, direct injection, variable valve lift and variable valve timing.

Models

135 kW version

When combined with the electric motor, the 330e and 530e overall output is and
In the MINI Cooper S, a temporary overboost increases peak torque by to.
This engine features a reinforced crankshaft with larger main bearings and new pistons with a lower 9.5:1 compression ratio. This allows the engine to take more boost pressure from a larger turbocharger, which blows compressed air through a reworked intake tract. Revealed in May 2019, this engine is shared with the new MINI Countryman JCW, Clubman JCW and JCW GP models. The engine output increased by to 306 PS and torque increased to.