THE next phase in the roll-out of the new Audi A4 saloon has started with the unveiling of S line sports models.

At the same time, access to a distinctive A4 S line has also become easier thanks to a new lead-in, 120 horsepower version of the 1.8-litre Turbo FSI petrol engine.

With the benefit of this new unit, A4 range prices start from £19,890 on-the-road, and new S line models are available from £23,490.

Not to be confused with the 1.8-litre turbo engine that has powered everything from the TT to the A6 in the past, the unit that has so far appeared in the A3 and new A4 in 160 horsepower form is new. The A4 1.8 TFSI has a top speed of 130mph and 39.8mpg combined economy, delivered with a modest 169g/km CO2 output.

The new engine is available exclusively in conjunction with a six-speed manual gearbox, but for drivers who prefer the convenience of an automatic, the unique-in-class multitronic continuously variable transmission (CVT) has also just opened for order in the new A4, in conjunction with the 160 horsepower version of the 1.8 TFSI engine.

Unusually by automatic transmission standards, the 37.2 mpg combined consumption figure and 179g/km CO2 output it achieves also run the manual version close (39.8mpg, 169g/km).

The A4 1.8 TFSI is the first A4 model to be offered in standard specification.

In addition to range-wide benefits normally associated with the executive class, such as a space-liberating electromechanical parking brake, intelligent key access and an auto-opening boot lid, it includes 16-inch alloy wheels, an 80-watt audio system, electronic climate control, front and rear electric windows and a split/fold rear seat.