BMW 5 - Manual (Page 20)

BMW
Media
Information
11/2009
Page 20
Four-cylinder diesel:
power up, leadership in efficiency even greater than before.
The engine range featured in the new BMW 5 Series is rounded off by
an upgraded turbodiesel setting new records in terms of efficiency in this
segment of the market. The 2.0-litre four-cylinder diesel in the new
BMW 520d combines a composite aluminium crankcase, the latest
generation of common-rail direct fuel injection and a turbocharger with
variable turbine geometry. The increase in power and efficiency over
the former model ensured in this way results from consistent optimisation
of the combustion chambers, the charge system and the cylinder head,
as well as the new arrangement of the ancillary units helping to reduce
frictional losses to an even lower level than before.
Thermodynamically optimised, the charge system in the four-cylinder diesel
engine ensures an optimum flow of power at all speeds and under all loads.
An electric adjuster sets the turbine blades in the turbocharger to the current
load status of the engine within fractions of a second, the engine thus
following the gas pedal immediately both at low speeds and under full load,
whenever the driver requires maximum power and performance. The fuel
injection system with magnetic valve injectors operating at a pressure of up
to 1,800 bars ensures precise dosage of fuel as well as a consistent, low-
emission combustion process.
Maximum power of the four-cylinder is up 5 kW to 135 kW/184 hp at an
engine speed of 4,000 rpm. Up by 30 to 380 Newton-metres or 280 lb-ft,
maximum torque comes all the way from 1,900 to 2,750 rpm.
This accelerates the new BMW 520d to 100 km/h within just 8.1 seconds
and gives the car a top speed of 227 km/h or 141 mph (provisional figures).
Average fuel consumption in the EU test cycle of 5.0 litres/100 kilometres
(equal to 56.5 mpg imp) and a CO
2
rating of 132 grams per kilometre
(provisional) give the BMW 520d even greater leadership than before as
the most efficient car in its segment.
Optimised six-speed manual gearbox with dry sump lubrication
featured as standard.
Innovative technology ensures enhanced driving pleasure and optimised
efficiency also in transmitting the power of the engine to the rear wheels
of the new BMW 5 Series Sedan. Benefiting from dry sump lubrication, the
six-speed manual gearbox on the BMW 535i, BMW 525d and BMW 520d
has significantly lower drag losses and avoids oil splash losses completely in
the interest of even greater efficiency.