AUDI is on the march, attempting to consolidate its double-digit sales growth over the last four years with yet even more derivatives of its B8 generation A4 sedan and wagon. The 2.0 TFSI quattro is the latest, introducing the S-tronic dual-clutch gearbox to the range for the first time, as well as a highly tuned version of the direct-injection turbo four-cylinder petrol engine found in the acclaimed VW Golf GTI. The specifications look impressive, but how does it all translate out on the road. Read on and find out ...