AUDI'S high performance flagship model, the A4-based RS4 Avant quattro, goes on sale in the UK around October offering a 155mph top speed and storming acceleration from 0-62mph in 4.9 seconds.

The RS4 features a 2.7-litre twin-turbocharged V6 engine producing 380bhp, a six-speed gearbox and quattro permanent four-wheel drive. Audi has not revealed prices, but expect it to cost about £45,000.