Audi's Q7 and Q5 SUVs get a little brother with the arrival of the compact Q3 in 2011.

The new compact SUV, which will complement the five-seat Q5 and the seven-seat Q7 is the first step to expand the Audi range portfolio to in excess of 40 models by 2015.

We have already seen five new cars due for introduction in 2009 including the new A4 allroad quattro and S4 Saloon and Avant, the A5 and S5 Cabriolets, the TT RS Coupe and Roadster and the R8 V10. Still to come are a further three new models or replacements before the end of 2010.

Already this year, Audi has confirmed production models such as the Q3, but also with debuts of concept studies that could form the basis for future production models. The new Audi Sportback concept hit Detroit in January with a blend of sports coupe desirability and five-door hatchback practicality.

The sleek five-door GT is the latest in a long line of Audi design studies, many of which have transferred virtually unchanged to the production line, and not only offered a glimpse of Audi's future design vocabulary, but also raised the stakes technologically with a new TDI engine featuring the world's cleanest diesel technology. This technology is already production-ready and will be a feature of the recently announced Q7 3.0 TDI Clean Diesel.

Meanwhile the Audi A4 Avant has left the executive car park to head for the hills as the new A4 allroad quattro, a more agile and ruggedly styled interpretation of the acclaimed compact executive which made its world public debut at the Geneva Motor Show in March.

The spirit of the revolutionary Audi quattro of the 1980s was also reborn in Geneva for the 21st Century in the shape of the TT RS, a successor to the long-mourned classic equipped with a new high-tech interpretation of the quattro's evocative five-cylinder turbo engine. Now available to order in the UK in Coupe and Roadster forms, the new high performance sports cars are set to reach their first customers in June.

Furthermore a new version of the acclaimed Audi TT Roadster will make it a little easier for sun worshippers to weather the economic storm as they work on the all-important tan this summer. The new TT slots into the range just below the existing 2.0 TFSI model, and runs its more familiar relative impressively close both on the equipment checklist and on the move thanks to its all-new 1.8-litre TFSI petrol engine.