The 520d is the only four-cylinder 5 Series, and it’s also the only one without active steering. But standard equipment still includes leather trim and partially powered front seats. climate control, alloy wheels, foglights, remote central locking, satellite navigation, Bluetooth preparation, six CD audio, trip computer, cruise control and DataDots security.
This 2.0-litre all-alloy engine employs common rail fuel injection, a variable geometry turbocharger and a 16-valve cylinder head to produce 125kW at 4000rpm and 340Nm at 1750rpm. Unsurprisingly, the 520d has the least power of any 5 Series, but no six-cylinder petrol 5 out-torques it.
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BMW’s claims 6.1L/100km combined fuel consumption average for the 520d, while we recorded a still impressive 7.1L/100km. That put our CO2 emissions at 188 g CO2/km versus the official claim of 162 g CO2/km.
Importantly, this engine is also fitted with a particulate filter, which reduces the amount of carcinogens pumped into the atmosphere.
BMWs are often blighted by stiff sidewall run-flat tyres and sports suspension set-ups that combine to deliver a harsh ride.
But the 520d’s 16-inch Pirellis are softer non run-flat and the suspension is tuned quite conservatively. The end result is a comfortable and absorbent ride that is great for a BMW and pretty good compared to most rivals. It’s still not in the class of Benz’s pampering E-class though.
In town the 5 Series is a decent drive, although we appreciated the optional parking sensors fitted to the test car. The B-pillar was also quite thick, obscuring the right-side head check.
Comfort and practicality
Space in the rear is good for two, without being outstanding. The third passenger gets poor legroom because of the high transmission tunnel.
The 520 litre boot is quite commodious, but there is no split-fold only an optional through-loading system.
The 520d is an appealing package in these environmentally delicate times. The cheapest car in the range is also the most fuel efficient and therefore the lowest emitter of CO2. Its price advantage goes some way to soothing the wallet savaging inflicted by more expensive diesel fuel.
The green exemption has made it more attractive in monetary terms, complementing its fundamental qualities as comfortable, sure-footed road car. It’s deservedly the biggest selling 5 Series.
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