CO2 emissions have dropped to a class-leading low of 124g/km with the latest versions of the BMW X3.

The new version of the BMW X3 sDrive18d achieves a combined fuel consumption figure and CO2 emissions of 60.1mpg and 124g/km. Meanwhile, the opposite end of the range, the new xDrive35d is capable of 152mph flat out and sprint to 62mph from rest in just 5.3 seconds, with official fuel consumption of 47mpg on the combined cycle.

The facelifted X3 is distinguished by revised styling, new colours, and revisions to the interior design and trim options. All models now feature more standard equipment, while customers can also choose a new xLine equipment grade.

SE models come with Nevada leather upholstery, two-zone air conditioning, Cruise control, DAB radio, Bluetooth and USB connectivity, 17-inch alloy wheels, front and rear PDC, Drive Performance Control, Rain sensor and automatic headlights. This has now been increased to include BMW's Business navigation system, heated front seats and an automatic tailgate.

An optional new SE Plus package adds Harman-Kardon speakers, sun protection glass, adaptive headlights, high-beam assistant and a one-inch increase in alloy wheel size for an additional £2,850.

The new xLine models can be identified from the outside by gleaming metallic inserts in the bumpers, Satin Aluminium side cladding and bars in the air intakes, simulated underguards at the front and rear and exclusive 18-inch alloy wheels. Inside, the new model features exclusive xLine leather upholstery, 'dark copper' trim and a sport leather steering wheel.

The xLine variants command a £1,500 price premium over the SE model.

M Sport models feature M aerodynamic styling and BMW Individual high-gloss shadowline exterior trim along with newly upgraded 19-inch light alloy wheels (previously 18-inch). Inside, there's a BMW Individual rooflining in anthracite, sport seats, M Sport leather steering wheel and aluminium hexagon trim; technical highlights include Performance Control and M Sport suspension. M Sport models carry a further £1,500 price premium over the xLine variants.

An additional new package is also now available: M Sport Plus. This adds a new 20-inch M Sport bi-colour alloy wheel, Xenon headlights, Sun protection glass and Harman-Kardon loudspeakers for £2,920.

The new-generation, all-aluminium, 2.0-litre diesel engines have increased power outputs. The X3 xDrive20d  is up from 184hp to 190hp, with the maximum torque available also rising from 280lb-ft to 295lb-ft.

The increase in performance cuts the zero to 62mph acceleration time by 0.4 seconds to 8.1 seconds. At the same time, the fuel consumption of the X3 xDrive20d, when partnered with the eight-speed automatic gearbox, drops by 7.1% compared to the outgoing model, and CO2 emissions are down to 138g/km.

With a new optional 17-inch aero wheel and fourth-generation reduced-rolling-resistance tyres, CO2 emissions are cut by a further 7g/km. In this configuration, the X3 xDrive20d - in which the new 2.0-litre turbo-diesel engine premieres - delivers class-leading figures: fuel consumption is 56.5mpg with CO2 emissions of 131g/km.

The new 150hp X3 sDrive18d, with rear-wheel-drive, a six-speed manual gearbox and reduced rolling resistance tyres, is even more frugal. The optional 17-inch aero alloy wheel records the lowest fuel consumption, 60.1mpg, and CO2 emissions, at 124g/km, of any premium SUV.

The range-topping variants of the new BMW X3 are powered by further developed versions of BMW's much lauded 3.0-litre, six-cylinder in-line, turbo-diesel engine. The X3 xDrive30d delivers zero to 62mph in 5.9 seconds, and achieves a combined fuel consumption of 47.9mpg and CO2 emissions of 156g/km. It develops 258hp with a peak torque of 413lb-ft.

The flagship model in the range is the X3 xDrive35d, offering 313hp and up to 465lb-ft of torque. Reaching 62mph from rest in 5.3 seconds it has a combined fuel consumption of 47.1mpg and CO2 emissions of 157g/km - both reduced over the outgoing X3.
Two- or four-wheel drive.

The BMW X3 18d is available in sDrive form, while all other models come with xDrive as standard.

The new BMW X3 goes on sale in June 2014, priced from £30,990 OTR for an X3 sDrive18d SE.