The X1 is available with a choice of three 2.0-litre diesel engines. The 18d has 141bhp, the 20d 175bhp and the 23d 201bhp. As you'd expect, the 23d is very quick, but the 20d is strong and flexible enough to meet most buyers' needs. A six-speed manual gearbox is standard on the 18d and 20d, while a six-speed auto is standard on the 23d and optional with the 20d.
BMW claims that the X1 provides 'supreme agility' in its class. That's maybe a bit strong, but it handles sharply and four-wheel-drive (xDrive) versions grip tenaciously. The steering is communicative, too, although the initial turn-in to corners could be sharper. The firm suspension won't be to all tastes – BMW might have been better sacrificing a little cornering sharpness for a more forgiving ride. It's not too harsh, though.
Like the closely related 3 Series, the X1 shuts out road- and suspension noise brilliantly, and there's little wind noise to trouble you at speed. It's a shame, then, that the X1's 2.0-litre diesel engines don't seem as hushed as they are in the 3 Series. They're rather gruff, in fact.
The X1 is hardly cheap for a car of its size. Running costs for the two-wheel-drive (sDrive) models are phenomenally low, though, thanks to excellent fuel economy and CO2 emissions. However, as you push up the range, costs start to escalate. That said, most versions are likely to hold their value pretty well.
The X1's solid build quality and switchgear are what we've come to expect from BMW, but some of the plastics don't have the dense, soft-touch feel that those in a 3 Series do, while some of the fittings aren't as classy as you'd expect for a car from a premium brand. BMW's reliability record is generally excellent, however.
All xDrive models come with the reassurance of four-wheel drive, but every X1 has a stability control system and six airbags. BMW's Performance Control system, which distributes power between the rear wheels, is an option.
Like most BMWs, the X1 is blessed with an excellent driving position and supportive seats. You don't sit as high as in a 4x4, but all-round visibility is good. Unfortunately, the pedals are offset to the right, which could make you uncomfortable on a long slog, and the inaccurate seat adjusters make it tricky to get comfortable.
BMW makes much of the X1's versatility and suitability for sporty, active types but, in truth, it's no more practical than some small family hatchbacks that cost half the price. Headroom is generous, but rear legroom is merely average and the bulky centre tunnel and rear wheelarches are intrusive. The boot is smaller than those in most rivals, but it's easy to fold the rear seats totally flat for more space.
For now, the X1 is available in just one trim level – SE – and you get plenty of kit for your money. Dual-zone climate control, 17-inch alloy wheels, rear parking sensors and a leather-trimmed multifunction steering wheel come as standard. Options include a reversing camera, panoramic glass sunroof and adaptive headlights.