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5 Series Sedan and Touring Facelift - E60/E61 (2007 - 2010 ) - Power unit: the engine

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5 Series Sedan and Touring Facelift - E60/E61 (2007 - 2010 )
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Power unit: the engine
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Power units: opening up a new dimension of Efficient Dynamics.
The new BMW 5 Series is entering the market with a choice of no less than nine power units either brand-new or thoroughly updated over the former versions. All engines offer a significant improvement in fuel economy, all engines rank right at the top in terms of all-round economy and efficiency within their respective category.
Depending on the specific engine involved, the various models in the new BMW 5 Series come with a range of technologies and features serving to minimise fuel consumption and emissions. Just some of these new technologies are Brake Energy Regeneration concentrating the generation of electricity for the on-board network on the car’s overrun and brake phases, a gearshift indicator helping the driver of a new BMW 5 Series with manual gearbox to shift gears even more economically, as well as active management of the brake and cooling air flaps serving to improve the car’s aerodynamics.
Operating on-demand, the electrical coolant pump in the new BMW 5 Series consumes much less power than a conventional pump and helps the engine reach its normal operating temperature at an earlier point. The Varioserv steering assistance pump, varying the curve ring as a function of pressure and volume flow, avoids the usual increase in drive losses as a function of higher engine speeds. And when the driver and passengers do not require the air conditioning, the a/c compressor is disconnected to reduce drag forces to a minimum.
Right at the top of the engine range, the two eight-cylinders, benefiting from optimised engine management and numerous innovations for enhanced fuel economy, offer a standard of efficiency quite unheard of in this performance class. Powered by a 4.8-litre, 270 kW/367 hp V8, the BMW 550i accelerates to 100 km/h in just 5.2 (Saloon) and, respectively, 5.3 (Touring) seconds.
Top speed is limited electronically to 250 km/h or 155 mph. Average fuel consumption in the EU test cycle, finally, is just 10.9 litres/100 kilometres (equal to 25.9 mpg Imp) in the Saloon and 11.2 litres/100 kilometres (25.2 mpg Imp) in the Touring, while the automatic transmission models are even more economical and fuel-efficient in each case, reducing fuel consumption to just 10.3 litres (27.4 mpg Imp) for the Saloon and 10.7 litres (26.4 mpg Imp) for the Touring.
Developing maximum output of 225 kW/306 hp from engine capacity of 4.0 litres, the eight-cylinder in the BMW 540i also offers sporting performance of the highest calibre. Acceleration to 100 km/h comes in 6.1 seconds and top speed is again limited electronically to 250 km/h or 155 mph.
The dynamic driving experience provided by this model is also enhanced by truly remarkable all-round economy, with average fuel consumption in the manual gearbox model of 10.5 litres/100 kilometres (26.9 mpg Imp) on the Saloon and 9.7 litres (29.1 mpg Imp) in the BMW 540i with automatic transmission.

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Straight-six with High Precision Injection.
The range of straight-six power units available for the BMW 5 Series comprises no less than three different power and performance versions.
Two of these engines displace 3.0 litres, the third is a 2.5-litre.
The most important highlight in technology featured by all of these power units is BMW’s second-generation direct fuel injection allowing fuel-efficient lean burn operation throughout a broad range of engine loads and running speeds and therefore providing a significant improvement of all-round efficiency also in everyday motoring.
This superiority is ensured by innovative piezo-injectors arranged between the valves and injecting fuel into the combustion chambers in the immediate vicinity of the spark plug. This particular position of the spark plug achieved by BMW’s engine development specialists despite the limited space within the combustion chambers is the prerequisite for the new jet-guided combustion process. The result is particularly precise fuel injection without the usual losses of fuel on the walls of the combustion chamber.
In the BMW 530i the 3.0-litre straight-six petrol engine develops a dynamic 200 kW/272 hp. Acceleration to 100 km/h comes in 6.3 seconds in the Saloon and takes 6.5 seconds in the BMW 530i Touring. Top speed of both models, in turn, is limited electronically to 250 km/h or 155 mph.
At 7.7 litres/100 kilometres (equal to 36.7 mpg Imp) (Saloon) and 7.9 litres/ 100 kilometres (35.8 mpg Imp) (Touring), average fuel consumption in the EU test cycle is approximately 12 per cent better than with the former models. And the improvement of fuel efficiency is even greater on the BMW 530i with automatic transmission, being reduced to 7.5 litres (Saloon) and, respectively, 7.7 litres (Touring) (37.7 and, respectively, 36.7 mpg Imp).
The BMW 525i also boasts a 3.0-litre straight-six within its engine bay, in this case developing maximum output of 160 kW/218 hp. This accelerates the Saloon to 100 km/h in 7.1 seconds and provides a top speed of 248 km/h or 154 mph. The BMW 525i Touring, in turn, accelerates to 100 km/h in 7.4 seconds and has a top speed of 243 km/h or 151 mph. Average fuel consumption under the EU standard is 7.4 litres/100 kilometres (38.2 mpg Imp) (Saloon) and, respectively, 7.7 litres/100 kilometres (36.7 mpg Imp) (Touring).
The third six-cylinder with High Precision Injection is the 2.5-litre power unit developing 140 kW/190 hp in the BMW 523i – which again makes this engine 10 kW/14 hp and, respectively, 5 Newton-metres/3.7 lb-ft more powerful than its predecessor. On the road, this kind of power enables the BMW 523i Saloon to accelerate to 100 km/h in 8.2 seconds and reach a top speed of 237 km/h or 147 mph. The BMW 523i Touring, in turn, accelerates to 100 km/h in 8.5 seconds and has a top speed of 230 km/h or 143 mph. Average fuel consumption of 7.3 litres/100 km (equal to 38.7 mpg Imp) (Saloon) and, respectively, 7.7 litres/100 km (36.7 mpg Imp) (Touring) is approximately 12 per cent lower than on the former models.

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Last Updated on Monday, 12 April 2010 14:41  
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