What is it?
The 320d ED is part of a refreshed 3-series range, which only sees cosmetic (including new bumpers and lights) changes awarded to the coupe and cabrio.
However, the standard 320d models get a refreshed engine, with a new 1800bar common rail injection system and an extra 7bhp (for a total 182bhp) and an extra 22lb ft of torque, taking it up to a maximum of 280lb ft.
The standard 320d also gets the full compliment of fuel-saving Efficient Dynamics kit, including the ability to selectively ‘switch-off’ the electric power steering, oil pump and air-con compressor. Start-stop is also standard. The upshot is that the standard-issue 320d is good for a Co2 figure of 125g/km.
The 320d ED, however, has a de-tuned version of the 320d engine, with power reduced by 20bhp. Added to this is a package of additional engineering measures including a longer final drive ratio, lowered suspension front and rear and new aerodynamic wheel rims.
The upshot is that the 320d ED has fractionally slippier body (a Cd of 0.26 instead of 0.27) and Co2 emissions that fall to supermini levels of just 109g/km, a remarkable figure for a car of this size.