Audi is broadening the A1’s appeal with a new five-door Sportback version, expected to account for two-thirds of A1 sales. But this is more than simply an A1 with an extra pair of doors, there’s a more spacious interior with room for five, unique styling cues and a pair of brand-new engines, too.

Although identical in length to the three-door, the A1 Sportback is in fact six millimetres taller and six millimetres wider, so there’s a fraction more rear legroom and head room as a result. Don’t expect acres of space though, six-footers will find it hard to squeeze in the back, although an extra 11cm of headroom makes a difference. Boot space is on a par with the three-door at 270 litres, or 920 litres with the seats down.
Besides the extra doors, there’s a variety of ways you can distinguish the Sportback. A full contrasting roof is available in silver, black or the Daytona grey colour you see here - the Samoa Orange paint is also unique to the Sportback. The good news is despite a roof that’s higher and extends a few millimetres further, there’s no penalty in terms of style.
For such a compact car, there’s a huge range of engines to pick from, all fitted with stop-start. The cleanest is the 104bhp 1.6 TDI diesel with economy of 74.3mpg and emissions of 99g/km. The fastest is the 182bhp 1.4 TFSI, capable of 0-62mph in seven seconds, and the cheapest is the 85bhp 1.2 TFSI costing from £13,980. There’s also a 120bhp 1.4 TFSI and joining the range from the summer will be two brand-new engines - the 141bhp 2.0 TDI and a 138bhp 1.4 TFSI.
We drove the latter, which features a development of the cylinder shutdown technology already seen on the 4.0-litre V8 fitted to the new S6, S7 and S8. On light throttle loads it cuts two of the four cylinders, enough to boost economy by around 5mpg if you drive at a constant 30mph.
With all four-cylinders firing away though, and the turbo on boost, this is a cracking little engine. It revs smoothly and quickly, and the throaty exhaust note sounds great. It feels quick too, with only 1,125kg to haul along. Low weight makes for agile handling, and the Sportback dives into corners with all the enthusiasm of the three-door. The steering doesn’t have the same level of feedback as a MINI, but it rides better, even on the firmer suspension fitted to our Sport model. An electronic differential, which gently brakes the wheel with least grip, works wonders too – helping to resist understeer and maximising grip during cornering.
On our twisting test route, the two-cylinder mode didn’t have a chance to engage very often, but when we encountered a straight or downhill section of road, the switchover was imperceptible. Considering how popular stop-start has become, this fuel saving technology looks like being the next big thing.
Personalising small cars, like the Citroen DS3 and MINI, is big business nowadays, and the A1 Sportback’s interior can be customised in a range of garish colours, ranging from white to lime green. Raid the options list and you can go for wheels in sizes from 15-18 inches, sat-nav with 3D Google maps and upgrade to a 14-speaker Bose stereo. Order the latest MMI 3G system, and it allows you to connect your phone via Bluetooth and turn the entire car into a wi-fi hotspot.