Citroën will unveil its new DS3 at the Frankfurt show next month. VW's new Polo 3-door makes its public debut and Opel's redesigned Astra has new engines.

The DS3 will be the first model from Citroën's brand new DS line, a product range consisting of three distinctively "attention-grabbing models", the automaker said.

The distinctive 'floating' roof will be available in four colours - black, white, blue and red - to contrast with the main body of the car. The wing mirrors and rubbing strips can also be personalised in colours or chrome and the wheels and wheel centres will be available in a choice of colours, too.

The dashboard strip - which encompasses the air vents, instrument cluster, multi-function screens and scented air-fresher - will be offered with a choice of six finishes.

Five different trims will combine satin finish chrome with colours and leather. Even the key fob will include a disc coloured to match the body paint.

The DS3 will be launched with five Euro V-compliant engines - two HDi diesels and three BMW co-developed petrol engines combined with five or six speed manual gearboxes.

Meanwhile, General Motors Europe is readying the redesigned Opel/Vauxhall Astra line with new 'downsized' petrol engines and diesels with power ranges from 85-180hp which will be joined later by an 'ecoFLEX' model with 109g/km combined emissions.

The new model, which will be produced at the UK's Ellesmere Port plant for all markets across Europe, will be sold with eight engines range that reduce combined CO2 emissions and fuel consumption by around 10% overall.

Highlighting GME's strategy (like VW's) of reducing CO2 emissions through engine capacity downsizing, an all-new 1.4-litre turbocharged petrol engine will join the range from launch, producing 140hp and 200Nm of torque between 1,850 and 4,900rpm. This engine replaces the naturally aspirated 1.8-litre in the current range, yet features lower emissions, equal power and 15% more torque. It will the 1.4TSI unit offered in VW's Golf.

There will also be a normally aspirated 1.4 litre unit emitting 129g/km of CO2, and two 1.6-litre engines - one turbocharged, producing 180hp and the other an unblown unit developing 115hp.

The Astra's diesel range comprises 1.3-, 1.7- and 2.0-litre units with common rail fuel injection and combined CO2  emissions of up to just 129g/km with manual transmission and power outputs of 95hp to 160hp.

Most new Astras will come with six-speed gearboxes while a new, compact automatic transmission will be available for all petrol models.

Volkswagen, meanwhile, said its new three-door Polo would make its public debut at Frankfurt.

The three-door version features a more aggressive stance, with a pronounced kink in the window line just above a sharp crease running the length of the car.  The overall effect is to make the new Polo appear lower and wider than it really is, VW said.

The three-door model shares the same platform and dimensions as the five-door model. It's built at VW's Pamplona facility in Spain.

At launch the Polo three door will be available with six engines: four petrol and two diesel.