The BMW X1 established a new class of car, the premium compact SUV, and it is still defining this new niche. From autumn the BMW X1 xDrive20d EfficientDynamics will become the cleanest and most economical BMW X product ever.

Powered by a 161bhp 2.0-litre four-cylinder diesel engine with a combined fuel consumption of 62.8mpg, CO₂ emissions drop below a crucial threshold to hit 119g/km.  This means that it attracts a company car taxation band of only 13 per cent for business drivers.

The latest X1 takes the relationship between sporty performance, athletic agility and fuel efficiency to a new level. TwinPower Turbo technology, which combines a variable geometry turbocharger and high-pressure fuel injection, gives maximum power at 4000rpm, while peak torque of 280lb ft comes in at 1,750rpm and remains constant until 2,750rpm. A centrifugal pendulum absorber in the dual-mass flywheel damps out vibrations at low engine speeds, while new insulation technology eliminates engine noise inside the cabin.

The BMW X1 xDrive20d EfficientDynamics has Auto Start-Stop, Brake Energy Regeneration and an Optimum Shift Indicator adapted to suit the new engine’s characteristics.  Electro-mechanical power steering, an air conditioning compressor, which can be disengaged, and tyres with reduced rolling resistance are fitted to Streamline-design light alloy wheels, all come as standard. The car also has a long final drive ratio to reduce engine revolutions at cruising speeds, but it still takes the car from zero to 62mph in just 8.3 seconds.

The most economical X product ever starts at £25,715 OTR when it goes on sale in September 2011.