2005-2009 Audi S4 Quattro (B7)

The Audi B7 S4 Quattro, emerging from the Audi B7 A4 platform, made its debut in late 2004, signifying Audi's continued evolution in the high-performance segment. Despite Audi's classification of the B7 as a new model, distinctions from its B6 predecessor are subtle, focusing largely on cosmetic enhancements, yet it maintains the internal designation Typ 8E with revised sub-designations for its saloon (8EC), Avant (8ED), and Cabriolet (8HE) variants. At its core remains the powerful 4.2-litre V8 engine (BBK code), delivering 253 kW (344 PS; 339 bhp) at 7,000 rpm and 410 N⋅m (302 lbf⋅ft) of torque at 3,500 rpm, ensuring the B7 S4's performance remains as exhilarating as ever.

In terms of mechanical upgrades, the B7 S4 benefits from refined springs and dampers, and from the 2007 model year onwards, features an updated Torsen T-3 centre differential with a 40:60 front-rear torque split for manual transmission models, enhancing handling dynamics. The aesthetic and functional improvements include a new trapezoidal single-frame grille, Bi-Xenon HID headlamps, L-shaped tail-lamps, quad exhaust pipes, and distinct V8 badging, alongside standard 18-inch 'S-design' 7-spoke forged alloy wheels and a Bose sound system, elevating both its visual appeal and driving experience. These refinements ensure the Audi B7 S4 stands out as a sophisticated blend of performance, luxury, and technology.