So. Just how will this GT drive? It's hard to think of any car ever sold whose driving dynamics were improved by making it longer, higher and heavier. So there's reasonable scope to fear that the traditionally magnificent 3 Series driving dynamics may have been irrevocably corrupted here by a higher centre of gravity - you sit as high up as you would in BMW's X1 SUV - and a 145kg weight penalty over the saloon model. In the event, we don't think the men from Munich have done too badly. Crucially, at the wheel of this thing, you know still know you're driving a 3 Series: just a rather different one.
On to engines, which as expected are exactly the same as those offered on conventional 3 Series models. Most customers will want the 2.0-litre diesel engine, offered in 150 and 190bhp states of tune in the respective 318d and 320d models on offer. Go for the 320d and you get an xDrive 4WD option. There's also a TwinPower Turbo six cylinder diesel engine, offered first in the 258bhp 330d, which also comes with the option of xDrive 4WD. There's also a 313bhp 335d xDrive variant at the top of the diesel range.
If you're looking at petrol power, you'll find that again, the emphasis is on a single 2.0-litre engine offered in different guises. The 184bhp 320i manages 62mph from rest in 7.9s, while the new 252bhp 330i improves that to 6.1s and has to be artificially restrained at 155mph. I can't really see why you'd want to go faster than that in this car, but for those likely to be seduced by six cylinder power, there's a thirsty twin turbo 3.0-litre 340i model at the top of the range. With 326bhp on tap, this delivers the 62mph sprint in 5.1s.
All these figures are based on setting up your car in its fastest form, selectable through the 'Sport' and 'Sport+' modes on the standard Drive Performance Control system you operate via this centre console button. This is able to tweak steering feel, throttle response, stability control intervention and, if you've an auto gearbox, gearshift changes based on your preference.