BMW preps three new six-cylinder engines

2007 BMW 3-Series coupe
2007 BMW 3-Series

Next month BMW will officially introduce three new six-cylinder power-plants designed for the current 2007 BMW 3 Series model range. The upgraded engines feature direct injection twin-turbocharging technology, which not only gives the powerplants more, um, power and torque, but also significantly improve their fuel efficiency.

Among them, there will be a twin-turbocharged 2,993cc M57TU2D30-TOP diesel engine. Featuring 286 hp of horsepower, the engine was designed to power their BMW 535d E60/E61 sedan and wagon vehicles, but will also be available as an option for range-topping E90 and E91 models that are going to sell as BMW 335d.

As the German car maker put it in their press release, the diesel monster will be available in the 3 Series sedan, touring and coupe models, available from September 2006 under the 335d badge.

BMW M57-Series M57TU2D30 diesel engine
2007 BMW M57-Series M57TU2D30 diesel engine

The turbochargers will work in a special sequence, when the smaller turbocharger is available from 1,500 rpm, delivering hefty 95 per cent of maximum torque and reaching 580 Nm by 1,750 rpm, and the bigger one starts working closer to 4,400 rpm, helping to achieve a maximum power of 286 hp.

The engine is good enough to accelerate the 335d Coupe from zero to 62 mph in just 6.1 seconds, while generally slower Sedan and the Touring station wagon achieve the same acceleration in 6.2 and 6.3 seconds respectively.

Their top speed is electronically limited at 155 mph.

The second diesel offers less performance but, at the same time, lets save a buck or two on fuel consumption, as even 325d Touring achieves with this engine considerable 42.8 mpg.

The 3 Series Sedan is even better off, featuring 44.1 mpg and just 171 g/km of CO2 emissions.

With this engine, the 3.0-liter 325d Sedan makes it from zero to 62 mph in 7.4 seconds and achieves a top speed of 146 mph.

The 325d Touring gets to 62 mph in 7.6 seconds and has a top speed of 145 mph.

Photo: BMW

See also: 2007 BMW X3 compact crossover SUV