Power from the turbocharged six-cylinder 330d sedan is unchanged at 180kw/520Nm but fuel consumption is down 8.8 per cent from 6.8 to 6.2 litres/100km.
The twin turbo 335i also maintains its 225kW/400Nm outputs while cutting back consumption from 9.6 to 9.2 litres/100km – an improvement of 4.2 per cent.
BMW Australia managing director, Stavros Yallouridis, said the expansion of the company’s EfficientDynamics technology to improve fuel economy was one of the BMW’s responsibilities to consumers and to the industry.
“Premium brands must set the pace when it comes to sustainability.“BMW’s EfficientDynamics roll-out continues to deliver improvements in fuel consumption across a wide range of models, whilst retaining the typical BMW driving pleasure customers expect,” he said.
The addition of Brake Energy Regeneration – which generates electric power from energy otherwise lost as heat in the brake system – is the key to the 3 Series’ efficiency improvements.
It will be standard on all updated versions of the 320d, 330d and 335 including the Touring, Coupe and Convertible as well as the sedans.
The 320d and 330d will also score Electric Power Steering, which further contributes to the efficiency gains.
Unlike conventional hydraulic systems, Electric Power Steering is supported by an electric motor which ensures that energy is only used during actual steering manoeuvres.
If the steering wheel is kept in a constant position when driving straight ahead or cornering, the electric motor is inactive and therefore does not use any energy.
The updated 3 Series range will be available from December.