The 5 Series engine range grows with the arrival of a new twin-turbocharged 525d model and upgrades to the 530d and 535d for September 2011.

A new four-cylinder 2.0-litre twin-turbo engine replaces the single-turbo six-cylinder 3.0-litre unit. The new engine generates 218hp at 4,400rpm and 450Nm of torque from 1,500-2,500rpm, sufficient to improving acceleration while reducing fuel consumption by up to 20 per cent.  The BMW 525d SE Saloon costs from £35,135 OTR and the Touring £37,560 OTR.

Extensive modifications to the six-cylinder twin-turbo diesel engines in the 530d and 535d, both featuring variable turbine geometry, have produced increases in power and torque while at the same time achieving greater fuel efficiency. The fuel consumption of the 530d is around 13 per cent better, while the 535d now has a power output of 313hp.  These models are now priced from £38,780 OTR and £44,290 OTR respectively for the Saloon and £41,190 OTR and £46,600 OTR for the Touring.

The 5 Series in all its variants remains the ultimate drivers’ car in the executive sector. That position is strengthened with the introduction of Drive Performance Control as standard, which allows the driver to fine-tune the ride and handling selecting either Comfort, Sport or Sport+ settings. It will be fitted to all Saloon and Touring variants.

All four- and six-cylinder 5 Series models, have the addition of ECO PRO mode, which adjusts throttle sensitivity, engine response, the upshift points with the automatic gearbox, where fitted, and even the power consumed by ancillaries including climate control and heated mirrors.

Owners can now open the boot or – on the Touring – the rear window or tailgate through a simple foot movement at the rear of the car. Sensors in the rear bumper detect foot movement and if that person is carrying the correct key, messages are sent to the car’s onboard computer telling it to lift the boot lid, tailgate or rear glass hatch on the Touring.

In conjunction with the optional BMW Professional Navigation system, drivers are provided with accurate, instant details of traffic conditions through the Real-Time Traffic Information system, while the uprated Head-Up display now shows full-colour road-sign graphics. An extension of the BMW Night Vision system gives better visual and audible warnings of unseen pedestrians or cyclists.

September also sees the introduction of M Sport specification to the 5 Series Gran Turismo. Featuring an enhanced standard specification M Sport includes 19-inch light alloy wheels, M aerodynamic body styling, M Sport suspension and other interior and exterior enhancements. Prices for the 5 Series Gran Turismo start at £46,590 for a 530d GT.