Audi has released this full-length trailer for its family-friendly rocket, the RS 4 Avant. Propelled by the company’s 4.2-litre FSI V8 engine, which transfers its power to all four wheels via a seven-speed S tronic gearbox, the Avant has 331 kW (450 hp) and 430 Nm (317 lb/ft) to play with, allowing it to hit 100 km/h (62 mph) in just 4.7 seconds, while top speed is governed to 250 km/h (155 mph), although Audi will raise it to 280 km/h (174 mph) if you ask very nicely. Audi UK has just announced that pricing will start at £ 54,925 (€ 68,323), with deliveries beginning in Autumn.